What happened with PSG and Chelsea has nothing to do with the league itself, it will not make PSG crumble or change, they will get the league title again. What it could do maybe impact UCL for PSG , because whatever happened there, could be something they should be caring about during the UCL period, if Chelsea figured out a way to beat PSG then it would mean they could do it again, and other teams could fix it too.
What Chelsea did to PSG in the FIFA Club World Cup is definitely demoralizing but I'm sure that Luis Enrique would have taken the lesson learnt to correct that fatigue that befell them. Instead of hindering them next season Champions League, it will even motivate them more and make them not to underestimate any team. Even in the French Lig 1, PSG is still the favorite to win it with little resistance from any team that might peak up for next season.
After taking my time to rewatch the champions League finals between PSG and Inter Milan, I think Luis Enrique wouldn't allow the embarrassment he suffered in the hands of Chelsea in the finals to affect the performance of his team knowing too well that he was served with the dishes he's been distributing all along since his team became unstoppable. PSG players should rest a little then continue their preparation for next season and not let defeat affect what they have been able to put together.