Overal I really like this idea. but I do have a few problems with it.
First of all, The Stacking Critical Damage on the zeta leadership. That is a bit much. he already has Deathmark and T3-M4 already gives Crit damage for each debuff on the enemy team to droid allies. Damage enough I say. Change it for stacking Defence instead. to help with their survivability.
Secondly +40% Crit chance and 50% Turn meter gain is again too much. At least the turn meter gain. Imagine if a droid comes with a double hit basic. You will get an infinite loop. And we all know how they thing about loops. That won't end well. Also Aoe attacks will have a lot of wasted turn meter gain. Thou this one is more minor. The health recovery and stacking Defence (in my case) is strong enough.
Next is the target lock reapplying. First of all, Darth Vader's leadership with the reapplying damage over time has the condition that it only is that way while Darth vader is alive. I believe it should be the same here. add the condition that HK-47 has to be alive to reapply target lock and chance the duration to 2 turns (1 turn doesn't make much sense). This also makes his unique more important.
Continuing on the previous point. HK-47 doesn't apply target lock himself, nor does he benefit from it. I suggest adding Target lock on his assassination special. I also suggest adding an effect to his unique. Since it's called reconstruction I think something like: at the start of his turn HK-47 Recovers 10% Protection for each target locked enemy" would fit pretty nicely. Just an idea thou.
Finally his basic. A character's basic is used a lot. So I kinda wonder why the buffs last for 3 turns. I don't think I've seen anything on a basic last more than 2 turns. Thou this one is really minor (which is why I saved it for last).
Overall an awesome idea. I really love it.
P.s. I saw your like on my Hermit Luke Skywalker kit. Tnx, that makes me happy :) .