If anything I think this FIFA club world cup is like an moral booster for the Chelsea football club because outstanding was an understatement in the performance they displayed on that game against the giant slayers PSG but I guess they tasted their own medicine as Chelsea didn't even allow for them to score a single goal, it shows they have definitely improved.
Just like PSG after the champions league they became so fired up that they were becoming unstoppable, they became so tough in their mentality and their results where unstoppable until they got humbled but back to Chelsea, this will really give them that morale boost that will hemp them through the premier league, they do have a good form and improved play pattern but this is a huge added advantage that will help them have that fierce aura to challenging any team in the premier league not minding their form and strength.