Yasuo. Don't nerf base, but enter counterplay
Reducing his base stats doesn't feel like they way to go. The most problematic aspect of his kit seems to be his whirlwind With his dashes he easily manages it to come so close to his enemy that his storm basically becomes a point and click considering its speed
I would suggest to reduce the projectile speed of his whirlwind like it was done to Zyra's root (especially if we consider that knock ups are more powerful than roots, the cooldown is lower, the hitbox is bigger and it does not cost mana)