There is not that much difference between Chelsea and Manchester United players. The change of coach affects every team, but we cannot know whether this effect will be positive or negative. Even if Manchester United changes its technical team, I don't think much will change unless it recruits new and quality players.
Both Manchester United and Chelsea had a similar kind of season. Of course, it might look like Chelsea had a very good season because of the last few matches that they have played. Because in the last few matches, Chelsea was able to perform well. That’s why they have actually been able to finish two words pretty decent position. United was not even able to do that. The only thing they have done is the FA Cup. And that also happened because Manchester City made some horrible mistakes.
We don't know what kind of contribution Pochettino will make, and there is no guarantee that he can contribute. If he had gone to another club rather than Manchester United, I could say that he would have been successful, but when it comes to Manchester United, some things can be difficult to say.
Anyway Manchester United and Chelsea have to improve a lot in the upcoming season. I have seen some people say that the performance from Chelsea was going to improve with Mauricio Pochettino, but I really had doubts about that. Now Enzo Maresca has come, let's see how much he is able to do in Stamford Bridge.
It is said that Mourinho will go to Fenerbahçe. Fenerbahçe's presidential candidate says he has an agreement with Mourinho. This transfer news may become clear soon.
José Mourinho is probably going to stay out of the limelight for a little. But he is definitely going to come back and manage a big club as soon as he feels ready.