How people can even question this guys ability or even his £30m price tag is beyond me. Watching him play you can see he is years ahead where he should be, he is solid as a rock defensively and we've seen what he can do running at people or overlapping (most recently against Chelsea).
People had a few issues with him not getting involved in attack that much too which is fair judgement until if you watch any time he played with Di Maria, Angle pretty much ignored all his overlaps or gave him a nothing pass.
He will add to his attacking game and defensively I cannot think of a better young full back in the world and the scary thing is he'll get even better defensively too, he's 19, he has an amazing 7-10 years more learning before he 'peaks'.