PSG should not be dependent on Mbappe. And PSG management wants a stable squad. And that's why they coached Luis Enrique. Luis Enrique has experience working with new squads. I would say Spain's team is stronger because of Luis Enrique's hard work. And I believe Enrique will do well with PSG as well. First he is trying to stabilize the team. He is looking for a suitable match strategy for PSg. And if he is able to stabilize the team, I think he will build the squad with the players of his choice next season. Not expecting much from PSG in the Champions League this season. However, I think PSG will be one of the most worthy contenders for the Champions League title next season.
I agree that Luis Enrique is a coach who has a lot of experience, but he also needs support both financially and in terms of trust from all parties to build a better squad. Enrique has handled many top European players including Messi as one of his mainstays, but I think he should not really rely on one player in a team even though it can sometimes make a lot of difference.
Kylian Mbappe will leave PSG sooner or later, so it doesn't make sense to rely on him all this season. Luis Enrique may just need to use Mbappe to support his game plan while hoping PSG give him the green light to bring in a suitable striker to replace him, but I believe Enrique can handle it this season. Regarding the Champions League, Luis Enrique and PSG are not favorites to reach the final this season, but something unexpected is still very possible.