With more games on a consistent basis he could massively improve his decision-making, which is probably one of the most problematic factors in his game.
He disrupts the opposition with his chaotic and unpredictable play, but needs to learn how to choose the best available option at any given moment. He has everything to be a game-changer, but lacks in the mental department.
This season he looks much more serious on the pitch, probably has something to do with all that talk that Xavi wants him to be a leader in the attack.
We`ll see what he can do, if he finally stays injury-free.