You all realize that player ratings make up team ratings and are the main determinant of winners and losers in this game, right?
Colonels, if this assertion is correct, then how do you explain OR's example. UNC w. the slightly better overall rating, yet they are a terrible team and Rutgers is a national title contender. If ratings really drove the process that much, this wouldn't be possible (and it's downright common to beat teams that are 30/40/50 points better than you). I think you have overemphasized how much ratings determine success vs. other factors.
Just because a team underperforms doesn't mean that they aren't talented and aren't good.
Yes, if a team like UNC goes 6-20 w. a 188 rpi, it does mean they aren't very good, and that beating them is not very impressive.
The only thing that's concrete here are the player ratings, so why not use them...they're the deciding factors of performance.
Concrete? Yes. A good indication of how strong the team is? Absolutely not. So that's why I wouldn't want to use them. I don't think you can look at the two teams in OR's example and still say that ratings are the deciding factors of performance.