Couldn’t watch the game and this thread has been unbelievably unhelpful at giving me a review on what kind of game he had.
He’s ranged from being diabolical to very good.
That partly reflects different expectations. Some people judge him as though he was playing regularly and that represents his normal standard. Others, and I'd include myself, make allowances for the fact that he's not played first team matches for 16 months, probably didn't expect the call, and he was playing out of position, and measured his performance accordingly. By that measure, he did well without doing anything outstanding, but really Ole just needed him to be a pair of safe hands and he did that with some aplomb.
I thought he was the best candidate to fill in for Shaw and Williams - he's better defensively than Dalot, who for me looks for like a straightforward right winger, and Bailly can be prone to costly errors. He's physically more like Shaw, and has good pace for a defender. I just thought Ole was unlikely to pick him because of his lack of match time.
He strikes me as very much a Van Gaal player - brought in, like Rojo and Blind, because he can play in multiple positions in the Dutch style, hence the very different views on where he's best. When he first arrived he was described as primarily a right back. He looked good in the recent 2nd team games he played as a centre back, though.
It's difficult to give a definitive judgment on him because he's played so little, partly through injury and partly because he's been out on loan, where he didn't impress the supporters of the clubs he was at. I think Mourinho wasn't interested in him, so that may have affected his confidence, whereas Ole is prepared to look for the good qualities first. It also gives him a potential backup at right back, where Dalot has failed to impress. At the moment he seems to lack Williams' gutsy ability to get forward and Shaw is a more complete player than him. I wouldn't read too much into his passing back to Maguire - that's just nervousness in a player coming back into EPL first team football after a long break at that level - Tuanzebe was doing the same thing to Romero in his most recent games.
Sorry there's no easy short answer, but he's the kind of player some people will dismiss out of hand as "not Utd quality" and others will say, "give him a chance" - I would say the latter.
Just as expected really.