Looking forward to see Amrabat competing in that midfied, the midfied too soft against Arsenal, it needed energy and names like Bruno and Eriksen were absent in that game they did not have a good game and could not beat Arsenal midfielders.
Brighton are one of the sides when building from the backline to the front, with few players absent and Injured for Brighton Man United may have a good chance to win but that defense is too weak. Imagine Harry Maguire saying he wants to fight for his place when Man United should have sent him out on loan or complete sell out. He has never being a good player.
Brighton isn't depend in one or two players, but they're team work club and they always have someone to replace injured player without any issue. They have beat Newcastle and their performance are quite stable, I believe they will beat Manchester United which currently still in development.
Don't hope too much, Amrabat is just a classic defensive midfielder, there's nothing to expect since he was not that good in Fiorentina.
Brighton had a pretty good performance at the start of this season and their team play was well organized in all its lines, and that is inversely proportional to Manchester United's current performance
Of course this will be a very difficult match for Manchester United with their poor form but they have to play against a stable team like Brighton.
However, regarding Amrabat's arrival, I am also a little surprised by this transfer, because he has the same playing position as Casemiro while Casemiro has quite a good performance, only the other 2 midfielders in midfield who in my opinion are playing quite badly, especially Bruno, he is not a player hard woker.