They have such great players at the front that sometimes the problems at the midfield do not even matter. They tried to get some players before for the midfield but they are failing to do that direly, their defense is good, goalkeeping is good, offense is good, only thing that is lacking is a good midfield and I think they are not going to be able to fix that now anyway, so they will want to focus winning with this roster.
Their defense isn't great even if they have great players. PSG conceded 8 goals in their last 5 matches, it is bad to assume a solid team is defended. Defensive and midfield issues are the most obvious about PSG at the moment, but this season they are the title favorites for whatever reason now.
But this time around it is quite obvious that PSG as a team is even tired of winning the league one title.
Their major challenge is the Champions League and no matter how much investment they have been making in their team in order to win the Champions League. It has proven futile for so many seasons now.
I do not therefore think that the PSG players will be energetic and willing to play even much better as they are indirectly demoralized.