Marseille a realized that without Mabppe, this would be the first season where PSG looks a little weaker and they are really doing all they can right now, they are getting as many players as they can to get that one title. They are aware that they can't keep getting titles, PSG has unlimited levels of money, and they will make the team good enough, and probably will win this year too.
However, at the very least Marseille hopes that this season they could get the win, if they get the title this season, all this money will be worth it because they can then sell many players as champions, making much more money, that's important situation. I believe that we are going to deal with a great situation when this ends, we just need to pay this team close look. If they do fine, I can see them win it all.
Marseille has new face now because next season they have new manager and some of new players and it's interesting to know how far they go in this competition under De Zerbi because if i am not mistaken this is his first experience to train the team from Ligue 1 and Marseille has a tradition although they cannot considers as strong contender for race title but they almost every season reach to top 4 and let see it later whether De Zerbi can realize this target or not
About PSG i think without Mbappe this team is still very strong they even strong candidate for the title just like we all now and for forward lines they still have Randal Kolo Muani or Goncalo Ramos which can be played as the striker to replace Mbappe position so i am sure even without Mbappe PSG most likely will gets Ligue 1 title again