Actions speak louder than words. Eight 4A titles in 13 years and they choose not to play up. They play bigger schools all year and then drop down for the playoffs, so what are they afraid of? Is the playoff competition in 4A actually tougher than the CS8? How would Coal City, Brees (Central), and Murphysboro (Rochesters playoff opponents last year prior to the title game) fare in the CS8? Odds are, probably average to slightly above average. So you can't say the 4A south bracket is tougher than their conference.
Yes, they won 5A once, proving they can compete so why not play up every year? I know why they don't and it's the same reason no one outside of ESL does, they prefer the easy road to a title versus being challenged because it keeps the fans, boosters, faculty, and everyone else happy. I mean why play up and have to go through Provi, JCA, Metamora, Morris, and SHG (again) in 5A south when you can play Lincoln, Coal City, Brees (Central), and Murphysboro in 4A south? If they played up last year Rochester would have been the #2 seed in the south in 5A and would have had Provi in round 1. So why do that when they can draw Lincoln in 4A?
As fans we want to see the best play the best, but if schools develop an outstanding program they will stay right where they're at until someone makes them move up because as long as they keep the trophy case stocked no one questions anything. Don't like it, but I completely understand it.