That is why Amorim experimented in several matches by placing several players in positions that were not their expertise, he looked for players who fit the game scheme he wanted, but in this case Amorim got a dead end, therefore I agree with you, Amorim should postpone or try to change the formation because it is clear that the 3 defender formation that he applied is not always effective and there is nothing wrong with doing so.
Amorim has been looking for something since he joined the team, but it is obvious that he is not succeeding, and the reason is either that he is not able to understand the ALP, or that he will not be able to achieve anything with the players he has now.
But due to very bad results, I doubt that they are ready to trust him and give him funding for new transfers, and without this he will definitely not be able to change anything, so it is almost obvious that Amorim will be fired, since the situation is a dead end.
United problem is still lingering and nothing has been done to improve the team performance so that they can be winning matches easily. Amorim was the hope but since his arrival, it has been defeats after defeats.
I feel Amorim and United management needs to come together and discuss how the team will improve, anf let a decision be taken. It's annoying to spend so mucj in the last transfer and no good result to show for the expenses. Who will revive United is the problem now.