yasuo has the same early game problems as vayne
he DOES have a bad early game, he really does. but the amount of tools he has in his kit to baby him and protect him in lane is just RIDICULOUS. twitch has arguably the worst laning phase in the entire game, and the only thing he has is a delayed stealth. yasuo has a shield, a projectile mitigation tool, a dash, a knockup, it's disgusting. vayne is the same way. she has invis, a short-distance dash and a knockback that is unbelievably aids. you cant make a champ with a bad early game and then give him so many tools in his kit that just nullifies his early game weakness.
is the worst champion for the lanning phase.
and so on completely dumpster him. As for vayne.... she has 245247 escape mechanics one of which is a point and click knock back 2 screens away. So not similar at all.