We have seen in previous seasons how financially sound the PSG club is. But in their obsession with buying quality players they forgot that their club did not have a quality manager, by the time they realized this it was too late and a lot of money had been spent. Currently there is no significant star in PSG but we are not noticing much change in PSG's performance.
Mbappé was there last season, so the strength of their team last season was slightly higher than this season, but considering the performance of the matches PSG has played so far this season, there is no chance to say that PSG is performing worse this season than last season. PSG will continue their performance in the local league but the Champions League tournament could be a problem for them. Because the Champions League tournament is not as easy as the local tournament, if you want to survive there, you have to compete hard, which may not be possible with the current team of PSG.
Yeah, they are getting better results without Mbappe right now, but that doesn't mean that Mbappe was a problem for them, it's clear that Enrique didn't play Mbappe in some games to see what they should do, and they are still spending 100+ million more than other teams and they are still more than twice than any other team in valuation as well. So, it is not really a big deal at all.
I believe that the best thing to do for them is to keep spending money to stay the best and they build a good team and they could do fine. Plus, getting UCL is a very important thing and they are aiming for that, they had a very tough win but they did get a win and that is getting a great result, right now it is clear that we are seeing them getting the win so it wouldn't be a big problem at all.
I believe that they are going to do better this season, Mbappe wasn't an issue, but just because he is missing that doesn't mean that they are going to have any trouble.