Apart from the FA cup that was won by Manchester United last season I don't think United had any good performance in the premier League because they were always losing matches even in some matches where they are supposed to win their coach will make some substitutions that will stop them from winning the match. There's no better mapping that the management of Manchester United will do which will be beneficial to the team if the performance of the team is not improved, the coach is always having issues with the team Ronaldo and Sancho is a typical example of he wants to get things right in the team I think he should work on his relationship with his players. I wanted the United management to fire him after the FA cup which he won but since they still have hope in him to restore the performance of the team, he should do everything possible to make sure United become a better team or face the risk of losing his job.
You have bring a nice suggestion, because everyone know that even the FA cup that they where able to achieve is due to luck, because no one was expecting that they will be able to win Manchester city in the final. But anything can happen that is why football is a game. But to be sincere if the coach won't make is serious connecting within the players they will definitely be left behide, because their performance now is getting out of hand and if adequate care to the team is not been put they will lose every thing that they have put on the team. Because next season will be more tough than the last season that has just finish so Manchester united will need to have focus on their coach.