Doesn't look like anyone was off. Haji was punching the ground in frustration afterwards but it was never a free header, he had to move and then time it, which he didn't quite get right. That's the thing when you only get one chance.
I'm sure there's potential. His attitude is part of his strength and he'll lose the rough edges with time. Absolutely he needs to play somewhere but we'd be daft to sell him now, unless we get top money.
If KKH is the better defensively, which I'm hoping for, then I can see them "platooning" as the yanks would say. One starting and the other coming on at 60mins depending on the game.