Squad overhauls must go hand in hand with a balanced financial sheet, otherwise, Manchester United will face FFP sanctions. Amorim certainly needs new players, but I don't see the management agreeing to all his requests in the January transfer window. Actually, not all problems can be solved through the transfer market, sometimes with a different approach, players can regain their best form.
On the other hand, Amorim is still in the adaptation phase, there's a lot of mess inherited from Ten Hag, and it can't be fixed in a short time. Regardless of all that, I believe Amorim has the ability to boost Manchester United performance in the future, and it's not impossible for them to finish in the European zone this season. Manchester United also has a chance to qualify for the Champions League next season, they must make the best use of the Europa League.
FFP sanctions must be avoided and Manchester United need to look at options for the player support needed by Amorim so that they can compete with other strong teams.
Manchester United have spent a lot of money to buy players when Erik Ten Hak was the coach and maybe they need to make some adjustments to the players they currently have.
The players owned by Manchester United are also not too bad but not according to Amorim's wishes because every coach must see players in a different way.
Solving problems is not only by bringing in new players but coaches can also approach players so that they can return to their best form.
The adaptation phase may not be easy because the players they currently have still cannot carry out the strategy as Amorim wants and it takes time for Manchester United to become a strong team in the League again.