On the one hand, I feel that PSG best potential for winning the UCL trophy has passed, with the departure of Messi and Neymar last season. However, Mbappe is the hope that is now available, that is, if the management and club president succeed in convincing him to renew his contract and stay longer at PSG. In terms of experience, Luis Enrique is very reliable, he has proven his tactical abilities in the past when coaching Barcelona. PSG certainly really supports Enrique's efforts to present this prestigious trophy, they have a lot of budget to meet Enrique demands in shopping for the players he wants.
We have absolutely no doubt that PSG can win the Ligue 1 trophy again, because as we already know, other Ligue 1 clubs cannot match the depth of the squad built by PSG. On the other hand, if Mbappe decides to leave at the end of the season, I think Enrique can buy another good player, even though they won't get a player as good as Mbappe. Enrique must be able to take advantage of Mbappe company for the remainder of this season, to bring PSG to compete for the UCL trophy even though they are not the favorites.
Neymar and Messi are not a benchmark for PSG to become champions because in the end when they were at PSG even when talking about the Champions League their chances remained poor and even 2 seasons had to be eliminated in the round of 16 with expensive players like Neymar and Messi.
This is not about the player's problem but the problem of the club itself.
The situation of PSG is not very good in every season makes their condition remain the same in the end.
2 Seasons of hiring coaches who don't have much experience in the Champions League makes their situation remain unchanged and this season when looking at the condition of the players (apart from Mbappe) in the end we know PSG wants to change their perspective on players and wants to try to maximize with a slightly different coach.
Enrique is not a coach with any real experience when looking at his track record as he was only helped by his time at Barcelona but this could be a positive change when looking at what he has done for the PSG squad.