What I see, Amorim actually only needs to do a simple in-depth study and what is clearly visible is the back line in Man United's defense which still looks very weak. Even everyone would say the same thing if Man United's forward position was still a little better and could still be relied on. However, the defense always appears inconsistent. So, Amorim just needs to start everything from the worse things like replacing defenders who are no longer productive. If the coach can do this slowly, I am sure Man United will definitely experience slow improvements.
Ruben Amorim isn't a chemistry teacher but at the moment, he's doing more experiments than a chemists and that's because he inherited a team that was struggling so he's trying to figure out the best formation and style of football that'll bring out the best from his players. I've said it before now that though Amorim have a record of improving a team and making it strong and very competitive, I don't expect him to win a major trophy this season. I don't know how far they'll go in the Europa League but I don't see them as a serious contender for Europa League trophy this season