I don't think any adcs ability should be able to do over 1000 damage.
ADCs rely on auto attacks, mages rely on abilities.
got hit by a vayne Q for 1150 damage, cause thats fair that it does more damage than my ultimate as 
ADCs rely on auto attacks, mages rely on abilities.
got hit by a vayne Q for 1150 damage, cause thats fair that it does more damage than my ultimate as 
Vayne's Q - while busted and should be nerfed, is a AA modifier, kinda like Draven's spinninh axes, it's not really an ability in the way it does damage.
I agree entirely, which is why most abilities don't do that much damage.
However, AD assassins are cancer because they get the best of both worlds.
I seriously think all abilities should scale with AP, Auto attacks with AD. Makes the most sense and stops the hypocrisy.
Vayne q can crit for one thing, and for another, aside from the little dash it just buffs an auto attack. So really the whole point is to make the auto do more damage. Of course it will do a ton