Now, PSG's strength level is so different from before that all teams in Ligue 1 will have no hope of preventing PSG from winning the Ligue 1 title next season. Ligue 1 is no longer a formidable challenge for PSG with their current form, but I believe PSG will still have to fight harder for the Champions League, even though their current strength is much stronger than before.
PSG's level has indeed risen after winning the Champions League, but they can't be satisfied with that achievement, as this is just the beginning. The next task is to maintain their performance next season so that PSG remains one of the strongest teams, as maintaining consistency is no easy feat. In terms of competition in the French League, PSG won't face a difficult challenge, as several teams there have not been able to match their ever-increasing strength. Instead, the challenge PSG will face going forward will be their quality in facing competition in the Champions League, as defending a title is usually much more difficult than playing well.