I read that he played a part on resolving Mbappe's conflict with the club before he departs[1], so it sounds like he can influence things around to some extent. If he can do the same thing with other players maybe the dressing room would be better than before, although he doesn't give me that impression when I read his interviews. On the other hand some news suggested that the owners of PSG want to change their strategy and aim for long-term result, so who knows maybe thye will stick around much longer with him even if he failed to win trophies.

[1] https://www.goal.com/en/lists/kylian-mbappe-luis-enrique-never-play-for-psg-again/