Mbappe departure seems to have had a positive impact on PSG, their game is getting better, the quality of their attacks is getting sharper and their goal productivity is increasing. The victory at Lille's headquarters completed the previous two wins, their success in collecting full points in three matches made PSG dominate the top of the standings and their might in Ligue 1 was still able to be maintained. PSG performance is very different from when they were still strengthened by top players like the ones you mentioned above, this season they managed to score 13 in 3 matches. The quality of the squad makes PSG more confident in the Champions League, this time they have found their identity with an increasingly solid squad quality.
No need to be surprised by the achievement of the beginning of the season obtained by PSG and everyone knows without mbappe, PSG is still the strongest club that dominates League 1.
But the problem is now not only about League 1 but PSG must also be seen from its performance at UCL later and that's when you will know how the difference between PSG with Mbappe and without mbappe.
Whereas this is only the beginning of the season that we cannot see whether PSG can maintain its consistency and in my opinion when the UCL match has started to definitely get a stronger pressure despite having quality players but without mbappe, PSG will look bad at UCL.
This does not mean I think about something bad to PSG but we'll see how PSG will be in big competitions.
But I am happy to see the current PSG without relying on anyone and only club cooperation is able to build consistent performance in League 1.