I agree that Ross should not be played on the wing, but he has had opportunities in the CM and CAM role in quite a number of games this season and not performed. He just hasn't learned how to play his game when opposing teams target him.
Without Naisy's goals this season we would be in the bottom 3 for sure. Right now, I would definitely be playing Osman ahead of Ross in domestic games while giving Ross more of an opportunity in Europe where he seems to be able to cope better as the opposition don't seem to focus on nullifying him as much.
Ross will be a phenomenal player, I have no doubt of this... but he has had a poor season and while he has been played out of position for large chunks of it... I don't think anyone can say that this is the only reason he has torn the league apart.