Breaking down the direct and indirect yasuo nerfs.

Yasuo Attack speed per level lowered to 2.5 from 3.2

this is good. It means he scales less hard late game and needs more AS items to get him attacking crazy fast.

Base attack speed also increased to [0.67] from [0.658].

this is literally a .012 change. Because of this inconsequential buff he will now have an extra auto attack once every 100 seconds and a small buff to his early level Qs. It's but tiny compensation for the scaling nerf.

Last Breath (R) - secondary effect of increased bonus armor pen now only applies to Yasuo's critical strikes rather than all attacks.

this is huge. It means he will now NEED to build crit for his ult to be effective. This 56.7% winrate shit is gone. ( 56.7% winrate)

Recipe changed to [Jaurim's Fist + Long Sword + Giant's Belt + 550g] Health increased to 700 from 650 Attack damage lowered to 30 from 40

this is also pretty big. It makes it less worth it on yasuo in general and it nerfs his less tankier but still OP build. ( 54% winrate)

Combine that with his ult bug being fixed and boom, his winrate should drop substantially. Let us all rejoice.