This is a tough one as I believe that he has taken to playing in the side better than anybody expected. That said, I don't think he would be playing as much if it wasn't for injuries earlier on in the season - he would have been phased in much more slowly in better circumstances.
He is also beginning to show his weaknesses, disappearing from games and allowing the first goal quite shamefully v Spurs.
Don't get me wrong, he will merit a rethink for the next major update but him and his 2 Prem goals won't force SI to reinvent the wheel, I don't think.