How to balance Yasuo properly : Riot read this please
The problem with yasuo before his multiple nerfs was the fact that , mid lane, he could out trade most mage champions, reaching is strong late game really soon. Instead of nerfing his numbers, why don't you just nerf his E CD to 5/4/3/2/0 sec and nerf his ult bonus armor pen to 40%? This way you can revert his other nerfs ( except his amount of shield, the duration should be reverted to 1.5sec) I seriously think that, if his E had a "huge" CD early game, he wouldn't be able to duel most ranged champions early game.