I think the speed of the game and change of position really halted him. He was used as a much more attack minded midfielder in Brazil, not quite an attacking mid, but a central midfielder who broke forward regularly. Then he came over to England and was thrown straight into the first team to break up the play. Add to that the criticism from his own fans, and even players at times, must have been difficult. I, for one, didn't expect him to adapt at all really, and thought he'd certainly be gone, the fact he has though shows the character he has. Warming to Lucas now.