You know what Yasuo's problem is? Hes frustrating.
Because of his in-your-wave mobility youre never really safe. The last round of nerfs was a good step as someone who has to play against yasuo, but it didnt deal with the crux of the frustrational gameplay. This isnt a thread to say yasuo is OP or broken; hes overloaded yes, but he's fairly balanced except for his wind wall.
Yasuo's windwall is a 0 skill panic ability thats a dota 2 level hard counter ability. It needs changes, but it needs changes in such a way that yasuo is rewarded for using it properly. To that effect i have a suggestion; Make his wind wall slow down projectiles. 50/60/70/80/90% missile speed of projectiles which pass through it. As a defense tool the current wind wall is immaculate; by making it instead slow down projectiles instead of eating them entirely it becomes a skill based ability with unique interactions that allows yasuo to ACTUALLY outplay someone, not just tornado R because you blocked their rotation with a no skill ability.
... Alternately remove the skill entirely and replace it with his flow shield that has the current passive component (this would require a buff by the way), and when activated gains a shield that reduces the damage of projectiles by up 52/64/76/88/100% of projectile damage based on how much flow he has (100 flow = up to 100% of the value) when its activated.