If Chelsea will face the championship as they faced the Club World Cup, we will surely see some good things, but now is not the time to talk too much, we need to wait for the first useful results of the club and then evaluate, for now I have bet that they will win the championship, it is risky I know
I don't know, i see Chelsea as tired, perhaps the Club World Cup has drained all their energy, rightly as you say the only thing is to see the start of the championship and see if they can recover and give their best as they did last season.
In the meantime, let's wait and see.