The very best teams identify weaknesses in the squad, or areas that could be improved on, and make the personnel switch ahead of time, so you don't let all that work pile up on your plate. If PSG had done this, they could swap #Neymar for Dembele and Coutinho and be done with it and be set up to challenge in Europe.
Instead they may not even do that, and even if yes, they would still need top additions at DM, CB, GK and maybe FB. Ideally you'd want Kanté, Koulibaly and De Gea, but Neves, Umtiti and Donnarumma would be great for the future also. #PSG should just gather their assets and get rid of Neymar before gearing up for the likely loss of Mbappé next summer. Do what's possible now, if cards are played right, before the next World Cup, this vapid, high fashion ego entity could well become the toast of Europe on the football pitch.