Yasuo's passive and windwall

The crit part of his passive is essential for making yasuo be played as a glass cannon rather than a tank or some sort of bruiser. However, the shield in his passive and his wind wall make yasuo a bit too untouchable. The wind wall duration must be lowered and the shield should be replaced to force yasuo players to play a little less aggressive.

But overall riot designed a good duelist. He isn't a brain dead duelist like master yi.