Yasuo Q3 is a ranged ability. It should proc grasp as a ranged ability
I actually don't think it should proc grasp at all, but since I know Riot thinks of his Q as an aa, please consider his Q3 a ranged ability.
Yasuo is excellent at all ins. This is fine. But a champion who excels at all ins should struggle vs harass, and right now between his shield, wind wall, and grasp he can block or ignore most champions' harass.
All this would still be OK if yasuo were designed to be a lane bully who falls off late -- then you have the option of just trying to survive the laning phase and prevent him from roaming while you outscale. But Yasuo isn't a lane bully, he's a mid-late game carry who spikes really hard at 2-3 items.
This isn't okay.
Playing katarina, facing a yasuo, and knowing your only option if you want enough farm to be relevant is to build a first item Randuins, is not how League is supposed to work.