PSG could have closed the season with even 5 trophies but they failed in the FIFA Club World Cup. In the end this tournament was kind of a part of the previous season. Who could have thought Chelsea would be the one to stop them? 

I see some weakness in them against Premier League teams. Eliminating Liverpool and Aston Villa both were also not an easy work for them in the Champions League you know. I wonder whether Luis Enrique will find a solution for those teams too next season...