So I take back saying Quinn is horrible, I played her pretty much all the times I played today and she actually is really good. Just gotta get attack speed first which is odd for an adc as I usually go BT first. But she is really fun to play and not horrible like I thought she was.
If by Attack Speed you mean Blade of the Ruined King, sure. She doesn't greatly benefit from ASPD. At least, not more than normal.