Pound-for-pound, you'd have him as a very good right-back because of his otherworldly defensive ability, but when there's no one to tackle on that flank, he's got to be on the bottom half when ranking the best starting full-backs in the league, left and right.
He is embarrasing in the final third, but my biggest issue with having him as our first choice Rb is his contribution in the build-up. His technique on the ball is all wrong, his passing doesn't quite cut it, and he doesn't carry the ball. Everything his does is telegraphed, his passing, his movements, turn of pace. It is like watching a lanky version of Smalling at Rb. He is more a detriment to the team when we have possession, and comfort and sophistication in possession should never be underestimated as far as big clubs are concerned.
He has his uses, but he's got no business playing consistently at right-back for a top team. We should never have signed him.