I wonder why he became left wing back as right footed player. If he plays at right, he will be better, I think.
His body looks like a little bit small as a defender. But, as I think, he tries to move wisely as he defends. But, sometimes, when famous right wing rushes (like Ronaldo in Man, U.) he is skinned. Anyway, I would say he is a player who thinks and tries to read whole story of a game as he defends or attacks.
When he participates in attack, he dribbles well, sometimes skins a player in the other team, but then his cross goes to nowhere no one can get a chance to shoot properly. At that moment, disappointment stays for a while among every TH attacker including him.
The answer is he should practice a lot with right foot and left foot. He should practice from dribbling to skinning then finally crossing to exactly right place.
But, anyway, I think he has qualities to be a useful player on a team. Otherwise, AS Roma wouldn't have tried to get him last year. There should have been reasons why they wanted YPLee much. I don't think they are stupid idiots.