Selling the players they currently have when their performance is declining will be a big loss for Manchester United, because the value of their players will also decrease. But keeping them is also not the right solution, Man United clearly needs a refresh in their squad. So whether they like it or not, Man United must sell their players at a loss and spend their money again to be able to recruit new players who are more promising.
Why did you think Manchester United loan out some players last season? It's because they are not yielding anything to their trophy yet there wasn't any buyers that will give them good amount to trigger their release clause and at the same time the club is spending huge amount of money on wages, this is why the club decided to sell some players so it can save some money but somehow, the buy clauses are all for nothing as their loan clubs refused to retain them.
It's either they sell them or Amorim used them like that way but has to improve every possible ways to make the clubs more valuable. If at all they can put that team back to top 4 in 2025, there is going to be a more value to those players and who knows, it might just be perfect time to sell them before they have their contracts expired, but for now, they are of no use because which team is ready to pay that huge amount of money weekly for mid players.