Is Vayne OP/Strong?

She has incredibly outplay potential. Her stealthing mechanic allows her to juke people and possibly pick up kills in situations where another ADC would have most likely died. This requires a high skill level. The problem with this is, she is a skill based ADC. Also her early laning phase is HORRIBLE in most traditional 2v2 matchups, meaning she has to really know what she is doing if she wants to win. If she does get ahead, though, the game is in her favor from that point on. She has one of the better late games for ADC's and she blows up tanks very well, her main "flaws" are that her late game is inferior to champions like Trist/Twitch and she doesn't have that good of a range, so if the enemy has good wave clear, you might have problems taking towers, at least if she is your only form of tower dmg. Besides these, she is "okay".

Not as strong as some other adcs but still viable but the gap between adcs is pretty balanced in my opinion. If you like vayne pick her shes plenty strong. But i'm just bronze so yeah my opinion is sorta not to valid on your high elo. As a support main if I see a vayne I will change my support to fit vayne because not many supports fit vayne and she needs a support that is good early game and can fight without her there and protect her untill late game. I think lulu, fiddle, zyra go good with her.

Vayne is aids, and currently she's not that strong because she can't be allowed to be strong.

Vayne is my most played AD, she's like the 3rd-weakest ADC in the game currently.

She has no place in the current meta. I think she's great in 1v1's don't get me wrong, but the meta is about grouping and having teamfights. All the toplaners/midlaners/junglers have enough gap-close and burst damage to kill you instantly or cc you. There is no reason to pick Vayne over other ads.

Strong, most definitely. Op, eh, in the right hands I guess. She has insane 1v1 potential mid/late game, though she does have some hard gates placed on her as a result.