If MU pursues the trophy in European league but forgets how to increase their rank in a premier league, that is an inappropriate step. It's so funny that they're champions of the European league but degrading in the championship. I think Amorim must be thought it if the competition is not only on European but Premier League also that they have to fight the same as they did in Europe. I don't know what he should be doing now, but for sure looking for new players for replace the current player is the right step at this time, don't be late because some players they are target also wanted by other clubs.
In Premier league Manchester United at 13th place so it's impossible for them to finish at top 4 or champion league spot so if Manchester United want to playing on that competition i think the realistic target is winning Europa league because we all know the winner can automatically gets one spot on Champion league for next season so starting from now probably Manchester United should be more focus in this competition because basically they have good position to qualify and i know it's not easy to gets the trophy but nothing is impossible
You are right, it will be difficult for Manchester United to enter the top 4 when the Premier League competition ends later because their current position is very unlikely and the only ticket to enter the UCL next season is to win the Europa League title even though there are also some strong team here that will be obstacles for Manchester United.
Although they have to focus on the Europa League, they also have to focus on other competitions such as the FA Cup and especially the Premier League because if they are negligent and make more mistakes then they could be very close to the relegation zone.
Furthermore, in the last Europa League match Manchester United must face FCSB and this is not an easy match because FCSB has fairly good performance, they must beat FCSB to make it easier in the future so that they do not need to go through the play-off round.