What if yasuo's windwall instead of blocking projectiles...
Caused them to slow down as they pass through the wall and while they are slowed down, if yasuo hits the projectiles with his Q they break. Like he's actual slicing the projectiles, would make it feel fun and more fair. To compensate, Ally projectiles speed up while moving through the wall (think like Jayce's gate)
(Please note that this is mostly a joke post, i know this is a dumb idea, just something funny i thought of)