The point about Schneiderlin and his lack of goals is not that it, "isn't his job", it's that he has been in plenty of good goal scoring positions and, bar one long-range pot shot, has made a hash of them. This calls into question his mental strength under pressure and his temperament IMO. This is not surprising as IMO his mentality is the big question mark hanging over him. There is no doubt he has the talent but does he have the mentality to produce his best form consistently, to maintain concentration under pressure and to retain his disciplince.
If the answer is, "yes" then he can be a top player. It remains to be seen but I am hopeful this will be the season where he leaves us in no doubt.