That is not really true, in my opinion. To me, his biggest weaknesses seem to be decision making, composure and vision. The best example of this was against City at home in the league, where he could have played a simple pass to Bruno that would almost have guaranteed a goal, but ended up shooting from a tight angle. Horrible decision that could have cost us points in the end. And there have been numerous of those type of situations throughout the season.
It looks unlikely that he will ever be good enough for Manchester United, but we could keep him around another year and play him in the easier cup games and as a sub. Another option would be to loan him out, but it is not like we are stacked in the forward position, so it might be best to keep him around to make up the numbers.