Coach P: Sorry for the delay in responding on this; I think it's the best "first-approximation" system I've seen. My only humble suggestion would be to denominate the number of games versus the top 25 by the total number of games; that way you don't have outliers in which a team has only a few games against highly ranked opponents causing their strength to be greater than a team with many more games against slightly lower ranked opponents.
If anyone ever cares enough to go to a "second-approximation" system (and it's probably not worth it) then there's something about region ranking that should go in -- teams leading regions tend to be hurt by this system -- but I have not a clue as to how to use that (or how important it is.)
