Yasuo shouldn't be able to ultimate off of displacement spells.

The tooltip clearly stats airborne champions.

For the love of god, it's beyond frustrating how I'm airborne for probably the shortest time by something like a Vayne condemn and he can for some reason ult off of this.

I understand that for some spells you're considered "airborne" but in all reality they're displacement effects added in the ability to give the champion some form of small amount of CC. A few great examples would be things like Jayce's E, Shyvana's ultimate and even Darius' pull. The reason why you're considered airborne is because it needs to be coded in some form so that it doesn't look like Darius just drags you to him. The character animations if they weren't designed like this would look sloppy and overall would be dumb. Vayne's E does this and overall it makes the abilities animation look stupid. But this is somehow considered knocking any enemy airborne.

Abilities that aren't designed to be knockups shouldn't be counted as sending any enemy airborne.

Thematically it makes no sense.