What if Aatrox W wasn't 2 forms but 1 combined form?
It wont be blood price or blood thirst, it would be a combination of the 2 that drains the enemy's health and gives it to him.
It would do bonus damage and drain health equal to that damage, like the keystone mastery.
Or maybe give him a new W that isnt so "3 hits for a prize" passive.