Just nowhere near productive enough to be a winger at the top level, unless something changes dramatically. He has 7 goals and 1 assist this season, here’s a compare against a select few players G/A:
Salah 23/8 (and this is a bad season for him)
Mahrez 12/8
Saka 13/10
Martinelli 13/4
Almiron 11/3
Son 10/4 (having a bad season too)
Its no wonder Rashford is exhausted, he’s carrying the attack single handedly. It really isn’t much of an ask to expect an 85m player to contribute a bit more rather than the occasional worldy.
Edit: and just to add, most of the players above are “difficult” to play against, full backs hate coming against them, Antony just doesn’t have that same fear factor.