One change to Yasuo to fix him
Pretty much all the comments and concerns over Yasuo are to do with his double crit chance. But that's not a big deal imo. Imo, the pain in playing against Yasuo is his wind wall, which just breaks the game, and if you blind pick a ranged champion into yasuo, you automatically lose. That's not fun or fair.
How to fix this: give Yasuo's wind wall scaling health. Something like "wind wall now has 1200/1400/1600/1800/2000 (+50% ap) hp before it breaks".