PSG have sold enough players this season that they only signed Dembele from Barcelona. There were many other star players including Messi Neymar in PSG but in the new season we don't see any star player except Mbappe in this club. Last season PSG released defenders, released strikers but did not buy any players, maybe they will look to enrich their squad in the next transfer window. If the team plans for the next season, they will certainly give the utmost importance to every position from the team's defense to the strike.
The truth is that having that too much players was not doing PSG much good because one of the things I noticed about PSG that time when they have Lionel Messi, Neymar, Sergio Ramos, Mbappe and so many other player, was that it affected the performance of PSG because it was as if there was no much understanding between those players and that was the reason why they were having issues wining matches because of there over squad, if you watch PSG in those days you will observe what I'm saying but since they sold almost all those players that was when PSG were able to come back to there normal performance, so perhaps PSG doesn't need too much players but what they just need is few players that can add to there improvement.