The squad needs star players. However, it is not always possible to perform well if there are star players in the squad. In this year's Premier League, we can see Chelsea and Manchester United teams as examples. A lot of talented and star players are in the squads of these two teams. However, their performance is quite poor. Qualification for the Champions League is unlikely to be achieved by these two teams. On the other hand, Aston Villa and Newcastle teams are performing better than Chelsea and United without any star players.
PSG definitely need a score machine like Mbappe to keep their performance stable. Mbappe has the ability to score a lot of goals. But if match strategy and chemistry between players is not good, it is not possible to survive in a competitive platform like Champions League.
Surviving in Ligue One is simple, there are limited challenges for Les Parisiens and that put then in a better position to win matches and titles because they're top club. If PSG could sit in the position to duplicate Kylian Mbappe, they will without hesitation, winning will become constant. Paris Saint Germain have risen from the top lead, they have started to settle for lesser outcome which weigh below their standards. PSG once upon a time had brilliant top names in the club but they couldn't hold tight of the club, resulting tem to become vulnerable to their opponents and they easily lost matches.
I would say PSG's performance this season is much more organized than last season. Their performance improved with the help of Luis Enrique. They are now consistently playing well in Ligue 1. However, PSG's performance against the big teams in the Champions League is still somewhat weak. And this is because the PSG team is so dependent on Mbappe. If Luis Enrique is able to reduce this dependence, he will be able to play well in the Champions League. Luis Enrique is likely to add several players to the squad to strengthen his squad in the winter transfer window. He will probably try to find a replacement for Mbappe. Looking forward to see what players PSG management try to add to the squad in the winter transfer window.