Blow it all up. No classes in Division I regular season (Division 2 can do the same). Everyone schedules 10 games on their own each year, even if home and away the same season. Travel improves, closer rivalries renewed. TSSAA can assist any having scheduling issues.
After 10 weeks, divide the 300 teams into 5 playoff classes by enrollment. Take the top 32 of 60 (computer ranked-record, strength of opposition etc), then put those 32 into 4 geographic quads.
If it were to continue, just take 20 day enrollment from the current year. Lots of excitement with nothing final until week 10 ends.