Hello, ive seen a great idea on the US forums - remove all HP bars!
We dont see enemy/ally CDs, we dont see DRs, so we dont have to see HP bars either! Why do we even see how much HP our allies or enemies have? Just hide this info like you did with DRs.
Add some kind of wounded crippled animation when a player gets to like 20% HP, and then at 5-1% HP have them suddenly drop to the ground with screams from pain. That how well know when a target is about to die.