Apart from the silly back heel to let Chelsea score I cannot see what he has done wrong. He is growing into the premier league very well. He doesn't shy from the ball and wants it at every opportunity (that is something McCarthy doesn't do). He is always looking for space to receive and he is actually looking for forward passes and attempts them if they are on. He switches play very well and against Swansea he was the outlet for players who were running into brick walls. He will only get better when he is more accustomed to the pace. Already looks a steal at 4m. He is perfect cover for Barry and McCarthy and I think is already at the level to step in to give either of them a break.