That's not normal at all mate, even though PSG were left behind by some of their important players, they still have a lot of talented players in their squad, of course there will be changes, but I mean the changes shouldn't be this significant. We can see all this when PSG played matches against Lorient and also Toulouse in the first and second weeks of Ligue 1, how can PSG only get 1 point at home when facing Lorient? it's ok if their opponent is Lyon, Marseille or AS Monaco.
Yes, it's true and But it seems that PSG needs to anticipate that it will find a new striker if in the end Mbappe moves to another club and does not extend his contract with PSG, even though there are several quality players in the squad without Mbappe in the previous game, nothing can be produced even for just getting a win is difficult and I think there is a need to add a few players on the front lines.
At least PSG's attacks don't look dull when Mbappe leaves PSG later or if indeed Mbappe stays at PSG at least look for additional new players to make PSG's attack power even better. The departure of Messi and Neymar also had a slight impact on their attacking power, even though there was Dembele but he didn't look any better
They narrowly escaped losing Mbappe this summer and where so strategic in trying to keep him in the team thereby making him to sign another contract, but I think Mbappe might likely move to another team next summer and it would be best that they start looking for a replacement while they enjoy his stay at the team this season, he's been so impressive for them so far and his recent performance has shown that they made the right choice in trying to keep him for another year, and making him extend his contract instead of termination it or loosing him for free next summer.
He's of a great influence to the player and is currently the highest goal scorer in the team this season, imagine PSG'S attack without Mbappe, it would had been weak even with the fact that they got Dembele, Mbappe is the key player currently for PSG, since they've lost Messi and Neymar and I believe he'll help them performan better in the Champions league this season.