Iowa should implement the playoff system used in Illinois. Technically no team knows which class they will be in until the end of the season although the smallest and largest schools have a pretty good idea. At the end of the season the top 256 teams are divided into 8 classes of 32 teams each. A team that was in 7A last year may have had a decrease in enrollment, but because they are one of the 32 largest schools to qualify, they are now in class 8A. Schools can at the beginning of the season elect to go up 1 class. Not many do but 4 did in 2023. Private schools also have a multiplier added to their enrollment which in most cases bump them up a class. They also implement a success penalty (not sure of the qualifiers) but the state will move you up a class if you are too successful. So, what teams make the playoffs? All conference champions automatically make the playoffs and every team that has won 6 games or more make the playoffs. In most years a handful of teams with 5 wins (see playoff points) have made the playoffs. Finally, teams are seeded within the class. 1A through 6A are broken into two geographic areas and teams are seeded in the geographic area. The top two classes are seeded 1 through 32 regardless of geographic location. Seeding is based first on wins and then playoff points. Points are determined by the total number of wins the teams have that you played. So, if a team you played goes 8 and 1 you get 8 playoff points and so on.
It's not perfect, but it tends to prevent long championship runs. In the last 5 years 4 teams have won the 8A title. The one team that won twice is a private school that has a multiplier added to its enrollment and elected to play up one class Like I said it's not perfect, but it seems to be a lot better than what Iowa uses.
Alright, I think after reading it about 38 times, I've figured out what you mean by how they do things, so I'll work on conferences for that later.
What I'd do with the current setup of the top 36 teams in Class 5A is consolidate it to just 4 conferences making up the largest schools.
-16 teams make the playoffs
-top 3 from each conference are guaranteed a spot
-remaining 4 spots are at-large berths
-top 2 seeds host 1st Rd games
-Regular season is 8 conference games, and 1 non-con
Here's how I'd divide 5A:
Central Iowa Metro League-
Ankeny
Ankeny Centennial
Johnston
Urbandale
Southeast Polk
West Des Moines, Dowling
West Des Moines, Valley
Waukee
Waukee Northwest
Iowa Crossroads Conference- (because every school is connected by the major roads HWY-20 and I-35)
Ames
Des Moines North*
Des Moines East
Des Moines Lincoln
Des Moines Roosevelt
Sioux City East
Sioux City North
Cedar Falls
Waterloo West **
Mississippi Athletic Conference-
Bettendorf
Davenport Central
Davenport North
Davenport West
Dubuque Hempstead
Dubuque Senior
Pleasant Valley
Muscatine
Ottumwa
Mississippi Valley Conference-
Marshalltown
Linn-Mar
Cedar Rapids Jefferson
Cedar Rapids Kennedy
Cedar Rapids Prairie
Cedar Rapids Washington
Iowa City High
Iowa City Liberty
Iowa City West
*-an exemption would be made for Council Bluffs Abraham Lincoln, so that they can stay paired with more of the teams in their region, and not be a complete geographical outlier in 5A. DSM North currently has a total BEDS over 1,000 and given their natural fit with the other metro schools, that is why they replace CBAL
**- Waterloo East and West will be merging into one centrally-located HS, expecting to start in 2028, which will make it one of, if not THE largest school districts in the state.