Ruben Amorin will now have a full season with Manchester United, so let's see what Amorin can do this season. This season will really be a proving ground for him.
Stabilizing the Manchester United team is a big challenge for any coach. In the last few years, several coaches have tried to stabilize this team. Bring back the old glory. But each coach has failed. Even an experienced coach like Luis Enrique could not achieve the expected success with Manchester United. So there is no doubt that the road ahead for Amorim is very difficult.
Manchester United probably will not have high expectations for the next season. Since Manchester United's performance in the last season was very weak. So if Manchester United can qualify for the Champions League this season, it will be a good result for them. But the Premier League is fiercely competitive. The competition to get into the top 5 of the table is also very fierce.
Luis Enrique hasn't coached Manchester United in his life. I think you are mistaking him for another coach that has coached Manchester United in the past. It is true stabilising Manchester United's performance is very difficult, and since Sir Alex Ferguson retired as Manchester United head coach, so many coaches have tried to stabilise Manchester United's performance and bring the glory days back to Old Trafford, but none of the coaches were able to achieve it, which makes a lot of people believe Ruben Amorim will fail at Manchester United. But since Ruben Amorim has initiated a new transfer policy at Manchester United, which is that a player he will sign will first of all want to play for Manchester United, I believe this transfer policy Ruben Amorim has adopted will help Manchester United perform better next season because Ruben Amorim will only sign players that will fight and defend Manchester United badge next season.