Let the kid adapt, it's been 8-9 games. Just because he is a big lad physically, doesn't mean it doesn't take a long time to adapt physically. I actually think he lacks stamina, his repeat effort work isn't amazing and this effects him technically.
He needs another very big pre-season before we will see the absolute best of him. In the interim, we have an incredibly talented player who is considerably better than the dross we have previously had. He also doesn't wilt or hide, even when its going against him.
Nearly scored twice at the end which would have had you all drooling.