User blog comment:Freedfg/Is vayne TOO versatile?/@comment-6906412-20130720012550

Vayne is pretty balanced IMO, if she gets fed then she becomes a monster, but if she can't get her damage she has a lot less damage than other ADC's right now. Her AA range might not be the shortest in the game but she has "shorter range" than other ADC's because she has no skills that can snipe or poke at long range (ex. Ezreal or Varus Q). In lane, use your higher range skills to harass Vayne when she goes for CS. Later in the game, Vayne is AS reliant, meaning Frozen Heart, Randuins, and other AS slow skills and items really slow her DPS. To deal with her stealth, get oracles or pink wards. To deal with the MS boost, use your CC to slow or stop Vayne. Like any other ADC, hard CC completely shuts down their damage, and a bit of focus fire solves all your problems. The tumble doesn't get her all that far in comparison to the Graves or Ezreal E, so if Vayne is caught in the middle of everything it takes more than a tumble or two to get out. Condemn only hits one target, not like the Lee Sin ult or Tristana ult which can potentially hit the entire enemy team. You only need two champs with gapclosers and decent damage to get rid of a Vayne.

What I'm saying is that Vayne is balanced since she doesn't have great range on her skills, and although she has decent mobility she needs to have crazy good positioning to put out damage and not get focused down. So long as you don't feed her early, use pink wards/oracles to spot her in stealth, and focus fire efficiently in fights, Vayne isn't all that bad.