@PigRiderStarWatcher a shame your previous post is gone. That really sucks. But lets go over your short version either way.
On your first point: I've said this one before but I'll gladly say it again. When I designed his lead, I never even had Yoda or any Jedi enemies in mind. It was just that when I was done with the rest I realized tat Foresight and Tenacity up where really easy ways to completely block his lead. A tad too easy for how good of a manipulator he was. Since his lead did nothing at the start yet anyway, I decided to add that, but make it for both sides to balance it out. It wasn't until later I realized how good this countered Grand Master Yoda. But I'm actually really glad it does, as it's thematically pretty accurate. So it was a surprise to be sure, but a welcome one.
As for your second point: It doesn't. I think you've missed a detail about the lead here. You see, it's true that for the staking Offence and Potency, units (other than Darth Sidious) have to be damaged by an attack. But for the Offence reduction and stacking speed, Darth Sidious has to be attacked by an enemy. Whether that attack damages him or not is irrelevant, as the effect triggers either way. So seeing as no effect rely on Sidious being damaged, the evasion doesn't conflict with anything. It's just additional survivability for Sidious.
Animations isn't soemthing I usually consider. So while it's a good question, I unfortunately don't have a good answer for it. Thank you for the reply and glad you seem to like it.