The part of Yasuo that doesn't make sense
He is tough in lane and a monster to duel...But he is a high skill cap assassin, so that works. But, why the potential for huge AOE damage? Assassin is supposed to blow up a single target, not a whole team.
An adjustment to his R may be needed. Maybe not even single target, but mitigate the group damage if he catches more then one person in their air.