@RIOT: possible Yasuo changes
Q: increase cooldown at early ranks. Fewer auto resets, less tornado zoning, and fewer free e/q knock up e away trades. (Something like 8/7/6/5/4). Separate "gathering storm" (1 stack) and "gathered storm" (2 stacks). Hold gathering storm for up to 10 seconds, hold gathered storm for up to 6 seconds.
W: Fix the size of Windwall (rank 2 or 3?) Have duration scale with rank. 1-2 seconds based on rank. Have it spawn at melee range.
E: remove stacking damage buff. Move the power elsewhere.
Other ideas to play with:
Crit damage -30/15/0% at levels 1/6/11 (if early game still feels too sttong)
Overall, I leave the buffing to you guys, since you will obviously have some power budget left after these changes, but I personally wouldn't mind some base stat increases, or reverting the nerf to his attack speed growth.
Hope this is helpful.