More flaws, maybe, but less serious flaws in my mind. Maybe it's a last year bias somewhat with the Chiefs, but all these teams I feel like have the ability to flip a switch yet and make the Super Bowl, whereas with teams like the Eagles, Broncos, Pats and even Bears, I just don't get that feeling yet (yes, I know the Eagles won the Super Bowl last year, but they looked unstoppable from the middle of the season on, and right now they just don't).
It doesn't really matter a ton, though, I just like to group teams into tiers based on my confidence level in them, and then sort them in there to do rankings, makes it easier to compartmentalize for me.