Personal humble insight about some Rebels rework (including ROLO and Ahsoka Tano (Fulcrum) rework)

Let's start with her unique ability, as that one gets the most attention in this post up till now. I agree with most others on the immunity to Fracture. Since there is only one character that can apply it, and immunity to it doesn't make much sense and is too op. Thou there is also a story reason as to why this isn't a good idea. Since Thrawn is going to be Ahsoka's main antagonist in her series, he needs to be a threat to her. A villain that isn't threatening isn't interesting after all. Since she already counters his basic (ability block dispelled automatically), her countering that makes Thrawn completely useless against her, which obviously isn't a realistic portrayal at all.
But that is actually not the only problem with her unique. There are 3 other problems with it: 1 that is broken and 2 that just don't make sense to me. But lets get to the broken one first: She gains Critical Hit Immunity when she is critically hit or shocked. Immediately there is a problem here since she has Critical Avoidance. Since the entire point of Critical Avoidance is to reduce the chance of a critical hit, pairing it with Critical Hit Immunity makes no sense. I mean, if she can outright prevent critical hits, why have any critical avoidance at all? But that isn't even the biggest problem here. The biggest is that she gains it when she is Shocked. Do you remember what Shock does? It prevents health recovery, turn meter gain, and buffs!!! The last is the most important here. Cause it doesn't matter that she reflects it onto opponents and dispels it, she still gets shocked. Which means shock is on her and in effect, even if only for an instant. Since she gains Critical Hit immunity at the moment she becomes shocked, the Shock will prevent the Critical Hit Immunity. So not only does it clash with her critical avoidance, one of the 2 triggers doesn't even work at all!! It will always be prevented.
Did you know Ahsoka's base speed is 168? So with +30 Speed her base speed is 198. Does that number sound familiar? No? Oh it's just the base speed of Moff Gideon. You know, the single fastest non GL character in the game! Seriously. Ahsoka already has a good speed stat in the game, why do you need to make it equal to the very fastest we have? This just feels like needless power for the sake of power. In fact, her rival, Grand Admiral Thrawn, has a base speed of 170. So the 168 feels appropriate to be honest. So I don't get the +30 speed here. It's just not needed at all. This is one of the 2 things in her unique I don't get.
The other is the reflecting of damage from Darth Vader. Why? Just why? I don't get why she could or should counter Vader. Like this or at all. Did you think the immunity to damage over time was to counter Vader or something? Cause I don't think it ever was. Look at it like this: Damage over time deals damage equal to 5% of the target's Max Health. When Ahsoka dispels debuffs from herself, she suffers damage equal to 10% of her max health (since an automatic dispel is very powerful, a downside to it seems fair to me. But that's me). Which means that the dispel deals more damage to her than the debuff itself. Which obviously would be a problem for her survivability, as Damage over Time is used by a lot of characters. I imagine Vader's lead did influence the decision as well, but I don't think it was the main reason. But even from another perspective, Ahsoka couldn't beat Vader, and she certainly didn't reflect any damage back at him. So even from a character perspective, this doesn't make sense to me. Which is why this is the other thing I don't get.
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Next I'd like to talk about her Whirlwind Special ability. Because in the game it's her best ability. But in your version it's her worst. This is because you objectively nerfed it's damage potential.
Currently it deals damage an additional time for each type of buff consumed. Which means each buff grants an additional +100% damage. But you only grant +50% damage for each buff consumed, which is significantly less (literally half). But that's not all. Since she damages multiple times, each hit can critically hit individually. Yours can only crit once. You'd think that that would make yours better, but that isn't necessarily true. As with so many hits it's damage output is actually quite consistent. Meaning it can be used reliably. As it will always deal a lot of damage. Yours on the other hand, is an al or nothing. You either crit and deal maximum damage, or you don't and deal minimum damage. In other words, your version is better against Nest, and worse against literally everybody else.
If you're also worried abut Ahsoka being squishy. You could take a page from Kylo Ren here. Make Ahsoka recover protection equal to the damage dealt by this ability. Another option is to add Protection Over time to her, which is what I did, but I actually think this works a bit better. (Basically, which I thought of this earlier).
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Finally her new lead. I'll start immediately by saying that it's actually ok. Just like her basic and Meditate Special, there's nothing wrong with it design wise. I just don't like it. So this is just my opinion, and you can disagree with it.
It's just that her lead doesn't interact with her kit at all. I mean, most lead work with the rest of the kit. (Thrawn with the protection and the extra special which allows him to fracture enemies for longer, Beskar Mando which grant him the exact stats his kit uses and massive amounts of turn meter due to him damaging many times, enz). But her lead doesn't synergise with the rest of her kit at all. Her kit is very non-unique buffs and debuffs focused, yet the lead doesn't do anything with those at all. It only has an unique stacking buff. So it feels very out of place. Plus I don't think she needs a lead at all. Her kit is actually pretty good as it is now. (I mean, I've seen her one-shot pretty tanky characters) She just lacks some survivability (which can be solved with protection recovery) and a team that allows her to perform at her best. A touch-up is enough to fix that. But that's it. Again, design wise nothing really wrong with it (other than it grants massive speed and her unique also needlessly grants +30 Speed).

For Captain Han Solo the synergy with Rebel Officer Leia Organa actually works against him here. Because it's actually too strong. I mean, Leia gains 80% Health, 40% Protection, and 50% Turn Meter. That is massive, especially the turn meter. Since this is only for Leia, it's much less viable when used on someone else (especially since with 40% Health recovery they are much less likely to be at full health afterwards). So this ability goes from "keeping the team healthy and cleansed" to "Keeping Leia healthy and cleansed. Just let all others die". Which is a mayor problem for your team's main healer.
But wait. His other Specials also has more effect when Leia is the one revived. So just let her die so the revive is more potent... Wait. is it keep her only healthy or let her be the only one to die? To be fair neither one is a great mindset for a healer/reviver to have.
And of course, it gets better. He also has 80% Counter Chance and has an unresistable stun on his basic. I mean, 80% is a lot. Even Raid Han has only 35%. Plus the stun isn't that hard to achieve, especially against Empire. So forget healing you team, just spam his basic and stun lock the enemies. Again, not a great mindset for your main healer to have.
This kit is so single focused overpowered, that it actually end up becoming pretty bad. Which is the mayor design flaw it contains. Oh and also the 2 zeta's. Just as with Leia, that is an expensive investment to make. A bit too expensive. Having only 1 would be better, but it's not as bad here since he doesn't require as much teamwork and investment to farm as Leia.

Now the lovable Droid Tank K-2SO. His new ability, Goodbye, is bad. Like really bad. Not by itself thou. By itself it's fine. But on this character with the rest of the kit, it's really bad.
Lets start with the synergy. K-2SO is a tank designed for Hoth Territory Battle. Which means he was meant for long battles with multiple encounters. His zeta on his unique reflects this the best, as his Max Protection increases every time he suffers damage. Meaning that the longer the battle lasts, the beefier he becomes. But this new ability puts a max on the time he can spend in battle, as at some point he decided to just blow himself up. Seriously, this ability makes the zeta on his unique entirely useless!!!! I'd demand a refund if this was ever implemented. But even then, having your teams tank just go away halfway during the battle isn't exactly a nice thing.
There's also synergy with other characters. Jyn Erso for example has a revive in her kit. But this ability makes it so she can't revive K-2SO. So that part of her kit is now less useful as well. Again, Rogue One is already quite updated, so we don't want to take even more away from them.
But lets go back to K-2SO by himself. Because there's another problem: The ability deals Special damage. Now this doesn't seem to be a problem, until you actually look at K-2SO's stats. K-2SO is a Strength tank. Strength character usually have more health and physical offence, but less special offence, and Tank characters usually deal less damage but can take much more damage. As you'd expect from these, his Special offence is...bad. Really bad. So this ability will do noodle damage. Losing this character for the rest of the battle for noodle damage, that's not worth it at all.
The only think that kind of works for this ability are the debuffs. Those are nice to have. But they are still not worth it, as the sheer amount of debuffs he would be able to inflict when he can just continue on or be revived, are much more. Especially under a Jyn lead. so again, the ability is not worth it.
There's one final problem. The fact tat he has to use it when either Jyn or Cassian falls below 1% Health. I mean, what if he's ability blocked when it triggers. It's still a special ability, but he can't use his basic due to the restriction. So you've effectively locked the game right there. (This is why Beskar Mando is immune to ability block. But that immunity on K-2SO doesn't make sense due to how his unique works with debuffs, and it's also incredibly powerful and not worth it due to all the other problems with it. The only immunity that would make sense for him is an immunity to Tenacity Down).
So yeah. This is what I mean when I said it's possibly the worst ability you could've granted it. I do admit that is too harshly worded, which I apologize for. But it's simply not a good ability for him.