A below .500 team getting in a is a joke. A 5-4 team getting in isn't that much better. Both from the DSM area. No shocker there.
Yes Ankeny is 5-4 but had the #15 RPI. Both Cedar Falls and Centennial did not pull away from Ankeny until late in the games. Ankeny led CF 7-0 at the half and only trailed Cent 7-0 at the half. The Ankeny D finally wore down in both games because the offense couldn't get anything going consistently. Special teams really hurt themselves against CF with two turnovers resulting in a 5 yard drive and a 20 yard drive so CF only had two sustained long drives for points in the game. Johnston only beat Ankeny 14-9. The Dowling game was a mess for Ankeny. That being said, do I expect Ankeny will beat Valley? No. But there's always a chance.
Ankeny's four losses.
#1 Centennial
#3 Cedar Falls
#7 Dowling
#8 Johnston
Here are the current BCMoore rankings.
http://ia.bcmoorerankings.com/fb/2018/latest/4ARank.html
Southeast Polk is 4-5 but had the #1 SOS and is ranked #11. Ankeny is #12.
Not trying to argue with you but just trying to add some perspective. The playoff system is not perfect but I like that 16 teams get in. There are only 42 teams in 4-A and all the "bubble" teams were 5-4 except SE Polk. Every team that is at least 6-3 made the playoffs. BTW Pleasant Valley got in at 5-4 with a bcmoore sos of 3. There were a few other 5-4 teams but all with an sos in the 20's and 30's.