Watching him for Dortmund a few times, he absolutely ran the show as a very young player against good opposition. It is clear based on comments from Ten Hag that he has had personal issues, and I hope as an England supporter he is able to overcome these and get up to his best in the Premier League.
That said, the fee Manchester United paid of over £70m was very high, added to this the extraordinary reported wages (most credible sources citing £300k/pw) means he is extremely difficult to move on, even if a buying club matches his transfer fee.
If the wages are close to the reported figure, this means the player is earning £15m+ per annum for another three years.
This leaves £45m in wages to pay, plus potential loyalty bonuses, performance bonuses and the remainder of the amortised transfer fee (£14.6m per season over three seasons - so £43.8m).
Manchester United are in a hole for over £90m with this player. They can either try and offset some of that by selling the player and recouping a portion of the transfer fee, plus paying the “difference” in wages from the pay cut he’ll have to take to move - OR keep him and hope he picks up form.
I personally think they’ll take the latter option and hope he comes good. Mainly because I don’t think anyone will come close to matching his wages, and the Glazer’s will balk at having to pay him £150k or so per week to play for a rival.
There’s maybe five clubs in the world who could afford to sign up and match his wages, and given he has been a relative flop so far, I don’t see why they’d want to.
I think he’ll stay.