I imagine a lot of it will have been down to confidence. I know he's had a fair amount of game time out on loan and he's looked pretty good, but turning out for a prem team, especially one where he wants to prove he's worth keeping in the team, is pretty nerve wrecking for a young lad. As he plays more and feels himself that he belongs in the team, we'll see more of what he's about. And like you say, he'll then be better on the ball in regards to riding/shielding challenges rather than drawing fouls.
Where did he go on loan ?