Why will PSG change their coach? Luis Enrique is a very experienced coach. PSG are very lucky to have an experienced coach like Enrique. PSG will definitely want to do well in the Champions League next season. For this, the PSG team needs to increase the strength of the squad.
Luis Enrique's main task now is to find a suitable replacement for Mbappe. Without finding a suitable replacement for Mbappe, PSG will not be able to do well in the Champions League. However, we still don't know for sure which player Enrique wants to add to the squad to replace Mbappe. But I believe Luis Enrique can make the PSG team more stable next season.
If they ever want to, I think it would be because they are commonly known as a team who fires managers that does well at league, but fails to win UCL. Which is what Enrique did, they failed to beat Dortmund, could have been at the finals instead. In the end, I do not think that he would be fired neither, that doesn't really feel like it would happen that commonly, but I just feel like we are going to end up with people who will call for his head, just because he failed to win UCL.
Next season is easier, because Mbappe left, that means if they fail to get UCL but win the league people would be a little happier about that instead. Of course that's not going to be all that easy, but we should definitely see them have a bit more ease.