He would adapt but would he be at his best? He struggled a bit at Barca, trying to shine among big talents and when I watch him for Arsenal, I sometimes see a bit of the Rooney about him in that he wants to be everywhere, coming deep to receive the ball, wanting everything to go through him. That works there because he's billy bigballs in that side but will he have that license in a team with Zlatan, Pogba, Mkhitaryan and Martial in it?
I wouldn't worry too much about him getting in the way of players because I reckon there's enough playing time to be shared around 6 players (Mkhi, Rashford, Martial, Mata, Zlatan and himself) in 3 positions. If Rooney, Memphis and Lingard were to move on, or were to see less gametime, I wouldn't lose too much sleep.