I haven't seen/heard the complaints about Leo's offense under Sauder, but I do understand the frustration with the lack postseason success. I'm assuming that Coach Sauder and his staff would trade most, if not all, of their conference championships for sectional & regional championships. I'm not saying that had they run a more modern offense they would've had more postseason success, but I do understand how people can draw that conclusion.
Since Coach Sauder has taken over, Leo has averaged 11.6 points per game in their postseason losses. Many of those teams had expectations to make it out of sectional and only 2 of them did (0 since 2011). Most of those losses boasted some solid defensive performances as well. Like it or not, the game is changing and more importantly, the strengths and abilities of opponents are changing. There are more teams now, especially in the upper classes, that are equipped with size, strength and speed (opposed to simply being a bruising team or a speed team). Teams can definitely have postseason success running more "traditional" offensive systems, but the results of the Leo's last 10 postseasons are suggesting that what they're doing isn't enough.
If anyone says that Leo's offensive system worked, that's fine. It won a ton of regular season games. But if you say that, you're also saying that Leo maximized their postseason potential the last 10 years and I'm not sure that's the case.
I do think Coach Sauder was a fantastic coach and his win totals reflect that. I just think that Leo may have left some meat on the bone the last 10 years and their offensive system may have been a part of that.