The first thing that is clear is that Mbappe seems reluctant to extend his contract but he is also still hesitant about leaving PSG and playing with another team like Real Madrid.
I think it is only good and right if PSG does not renew Mbappe contract; i think in my own opinion, PSG should fulfill Mbappe wishes and end this dilemna; how? by january, PSG should let Real MADRID bid for Mbappe and buy him off (such that when the summer comes, PSG Do not lose him for free). Any thing other than that then it is disadvantage PSG.
I think the league performances will improve and PSG will have no problem retaining their title.
It is quite obvious that Mbape wants to leave PSG because his friends are all out of the club,but it might really look hard for PSG to let him go because he is a very vital player to the team,and even if PSG would want to let him go,I think they should think twice before making any decision on Mbape because he is the kind of player that if he leaves a club,they will continue to miss him and won't be able to find any player that can replace him.
All the goal scoring responsibilities now depends on Mbape because he is the only reliable and proven goalscorer in that team.If at the end of the day,Mbape leaves PSG,it Will really be a big blow to them.