I find it funny that all the people on here bash the RPI (or any scoring system), when 4-5 years ago, everybody raved about how great this would be football. No more blowouts, only good teams getting into the playoffs, better state championships. Every game would count rather than only some of the games in determining who made the playoffs. We would get better in-season games. I prefered the district/runner-up system because of the simplicity.
My main concern as I have suggested for long periods of time is that school population is too limited in determining classifications. Classifications should be based on previous levels of success (or lack there of). The complaints of unequal competitiveness in districts become lessened when every team has been on the same level.
Move good teams up a classifications and bad teams down a classification. Re-classify every 2 years based on a 4 year rolling average for football (every other team sport should re-classify every year). Districts become more competitive, which allows less complaining.