I understand exactly what you are saying sir, the club world cup is just a one month tournament but it's very difficult to win that trophy because all the best clubs in the world are competing for it.
Looking at all the top teams in England presently, you can't mention four teams and wouldn't add Chelsea to the list, but just as you have said already, consistency is what determine how far a team can go when gunning for the title, so we are certainly going to see how far they can be consistent, but before then, I sees them as one of the top contenders this season, because in my own opinion, they have all it takes to go all the way in lifting this year English premier league title.