I feel that the club world cup is going to be boring since some top club that's supposed to make it more fun and interesting didn't qualify, but there's this saying that half bread is better than none, so I'll just follow up some match to keep myself updated on the performance of several teams and their recent signings while I wait for the real deal next season. For the match between Chelsea and Leon you didn't lie when you said it would be easy to predict since Chelsea are a better team than Leon but lots of Chelsea's players are going to be rested so they'll be fit for the new season the coach would pick most of the second team players are rest his senior players against fatigue so the result could go the other way round, a suprising result like you said.
No, i feel that is still interesting because there may be a changing on the position of the top. If weaker club can raise their performance better than better by recruiting potential player, they will have a chance to beat the strong team. Yes, Chelsea have a bigger chance to win than Leon but who knows because anything can happen in the field. With the rested of the player, it is not easy to manage their performance and beat Leon. Leon itself will not give up and give their best shot.