Aatrox
Make his abilities benefit from cdr. By that i mean right now there is no reason to build cdr on Aatrox. Because the abilities that would benefit the most cost you 10% and 5% curren't hp per use, and you get no hp back from hitting enemys and the q you would not wan't to used it in the mittle of a fight same with e because they would stop you from getting the max amoun't of W off so you would lose out on dmg and you would lose hp in the process.
Here are links for some of my ideas for Aatrox if anyone would like to commen't go right ahead: Here and here