The playing pattern implemented by Amorim has not fully integrated with the Man United players, he has also not found the right formation to improve the quality of their game. Two consecutive defeats during Amorim leadership forced him to work hard to get better results in the next match. Maybe he should stick with the current squad before the January transfer window opens, he has also identified various shortcomings in his squad, maybe Christian Eriksen and Antony will be released to other clubs to increase the budget to strengthen his squad.
It is okay to release the two players you mentioned to other clubs in the transfer window later as long as Manchester United can ensure to get two other great players who can fill important lines that are still considered weak at this time. Because Amorim not only has to be able to polish the existing players, but Amorim also has to choose the right tactics and formation for the current Manchester United players because in general Manchester United is still in a very bad position at this time in the standings table.
The two players he mentioned are not the problem of the team, I still find it funny why Marcus Rashford has not been sold out and the money used to get a better player who is ready to improve his performance wherever he is in a poor form, I expect the manager to declare the position of most of the players vacant after bringing in other good players from the transfer window, let the players fight to get their positions back if that will force some of them not to be part of the first team then that is what is good for them. Amorim can not get a first team when his players are not getting better and his formation will always not be good if there are no good players to fit in that various positions and that's what is affecting the team and making them to get poor results. Personally I think up to 5 players is supposed to leave the team I believe the coach can do a better job by knowing the players he wants and letting others go.