It's true, Manchester United must evaluate and try to improve its performance because Manchester United is one of the big teams that should be able to compete and remain the best. The era of Manchester United was over when its great players left behind. So the management must try to improve this so that in the next season's matches Manchester United can provide the best performance and position they can achieve.
The team management really has to think about this for next season because apart from having to be able to bring in new players into the Manchester United team squad, there must also be more significant changes on the part of the coach so that the whole team becomes stronger in the new season. Because Manchester United is not a small team that has to suffer the same fate as this season in the coming season, so there must be an evaluation and the team's performance must begin to improve for the sake of their revival next season.
In as much as I agree with you that Manchester united is a big club that is expected to be outstanding in Premier league and need to take measures to reclaim their reputation in the league, I will also like us to be aware that making significant change in the couching crews or bringing in players to add to the squad. If these are the yardstick that guaranteed absolute performance, Chelsea will always win the trophy. Chelsea do spend huge amount of money in the transfer market every windows and change couches frequently but no achievement to justify their spending. In fact, they perform better with their squad at a time they were banned from transfer market. Sometimes, making changes is very necessary but it doesn't equal to success, it is all about knowing how to manage the squad but this can not be achieved unless with experience couch.