Breaking up Aatrox's Q
So it's pretty clear that Aatrox's early game is strong and it's all because of his Q. If you hit all three parts you are going to outrade almost anyone. I think there is a pretty simple change that will make him less dominate early without gutting him.
Make each level of his Q activate one part of the ability. So if he has 1 rank in it he can only do the first strike. If he has 2 ranks he does two parts of it and when he has all 3 ranks he can do all three parts.
The numbers would have to be played around with but I think this would be a sold change to him.