I didn't think PSG can beat Manchester City even in their current state. Manchester City are not in a comfortable place in the standing and a win over PSG will be very important for them because it will significantly improve their standings and taking them from 22nd on the standings to 15th. This is a must win match for both teams but I think Manchester City will have a slight advantage over PSG.
The conditions are not like that because in the end even though they won they did not necessarily rise directly to 15th place because of course other clubs will also still play and they could get points especially for some big clubs like Madrid but indeed when PSG managed to win the chance to be in the play off is still there because their points increase to 10 points and they only need to hope that some of the clubs above them get less optimal results in order to shift their position.
Indeed, they could be in 15th position directly but in the end they have to win on the other hand the club above them must also lose and honestly it is a difficult thing when expecting other clubs to lose especially now for them to win against Manchester City alone is still questionable whether they can or not.
They still need to improve but with a long time to go while they focus on Ligue 1 they can better prepare for the final 2 matches in the Champions League and this should be put to good use by Enrique.