They are still expressing the joy of achieving a new history. Let them enjoy it in their own way, however, they are looking forward to it with a lot of effort and money.
Every team that will compete in the Champions League will definitely update their performance for next season. The new season will definitely come with new competition. PSG will definitely still realize that they have not dominated in Europe, they still have to fight hard for next season.
PSG got a golden opportunity this season especially after seeing top European teams getting eliminated one by one due to their instable performance, otherwise PSG bosses are more than aware that holding the Champions League title for another season will be mission very hard.
I suppose there will be some movements in the team but not that drastically change like the others. Real Madrid especially will have a good update and will be the main threat for PSG ambition.
The trophy race will be very tough and competitive when Madrid are back in top form, we know they are always the main favorites in the Champions League, so it makes sense that PSG will have a hard time defending the title next season. Actualy, all contestants have the same ambition to win the trophy, this will make the dynamics of the competition even fiercer. Meanwhile, the change in the Champions League format has made it difficult for some elite teams, especially because they participate in many competitions, next season they will learn from experience especially in terms of determining their priority scale. As the defending champions, PSG will certainly be taken into account, and traditionally teams like Bayern Munchen and Man City will remain title contenders. The movement of each contestant in the transfer market, as an effort to strengthen the depth of the squad, will clearly determine their chances of winning the trophy next season.