Talent-wise Oxford's definitely good enough, but a biased side on me would rather see TFM/Williams/Tuanzebe/Poole etc who are all around the same age to be give chances instead.
I think affinity to youth players is dangerous at times, and frankly a bit odd. I'll explain.
Oxford is what, 16/17. The day he signs, he'd be a United player, a United young player at that, and we'll then want the best one to play. The cycle will then repeat itself the next year if we are linked to a promising young player in his position. People will say that they don't want player x, they want Oxford to get more chances instead, and so on and so forth.
Without checking the thread again, I am almost certain posters didn't want us to sign Martial on the basis that they prefer Wilson to play. Well, they are both United players now, and nobody wants Wilson to play instead.
Essentially, and this may not directly translate to Oxford vs TFM - but there is almost a tendency to say 'don't sign player x, he is better than player y, which means y won't play'. Players come and go. Most of the youngsters people have been attached to are youngsters who themselves were brought in from other clubs and replaced youngsters who were here before them. So in reality, not a big deal if Adnan or Andreas don't get to play, they both came in from elsewhere themselves, and if we played Sane instead, who may just be better than Adnan, we wouldn't care within two games.
I can understand the attachment to Manchester kids or players we have seen grow up here since kids, but other than that, they were all new players here themselves once before we got attached. Same will happen with other players.