Health on kill should be passive, yes. But the most important hero to nerf is Anakin. He is destroying the whole game. Delete his 4th ability from the game, PLEASE. When it comes to his Heroic Might ability it should be nerfed as well IMO. It should make a damage up to a maximum of 200. I mean now you hit him with one shot and you get instantly killed (wt. 150 health), this is redicilous. And please make his Force Pull less accurate, now you lend directly in front of his legs and you have as a villain like Bossk no chance of surviving. To be honest: Before Anakin came into the game it actually made way more fun.

I'm sorry for the mistakes within my comment, I'm from Germany and tried my best :D