Reduce the range on Yasuo's Q
He gets a lot of free poke at a good range with it. I think this is the main reason he's pick/ban. He can safely poke melee champs with his Q and he is protected from ranged poke with his E. If you are going to double his crit chance and give him 50% armor pen on his ult, he probably shouldn't have so much free poke.
If you reduce this 50-100 it should put him into a healthy range.