When they first modified her for the Marksman update, they removed the Q blind entirely. Then she was the weakest of the reworks to the point where Riot had to give her something to make her actually even slightly useful. They didn't want her to get a Teemo-like blind back, so they gave her Nearsight on her Q. Honestly, I don't mind the Nearsight mechanic on her. Yes, it's annoying to deal with, but it's better than Graves because it's a skillshot that isn't hard at all to dodge. I feel like anyone who would call Quinn OP or in need of nerfs after all the nerfs she's gotten to bring the Q more in line just doesn't know how to play against her. Notice how rarely she's played. In low ELO, she can see some more play because she's put against people who have no idea how to deal with her - whenever I play her top lane, I usually get as much poke as I want on my opponent because they just don't know how to stop me. The passive mark is extremely random and usually won't mark the opponent over all the minions unless she does something specifically to make it mark them. If she does, the enemies can just back off and not care. And if they stand behind minions, the Q can never mark them and her poke becomes far weaker. She's forced to all-in her opponents to deal any kind of damage. Oh, and did I mention that the nearsight can be QSS'd or Cleansed? She has more than enough counterplay for anyone who actually knows it.