This is a great point and I considered that too. The imbalance of regions is a major part of the problem as well. That would have to be addressed first.
Another thing to consider (not as much for larger classes) is the split districts and regions in the bigger picture.
Just looking at the example here with the Shenandoah district, next year there will be:
Class 3: Alleghany, Rockbridge, Staunton, Waynesboro, Wilson
Class 2: Fort Defiance and Stuarts Draft
Class 1: Buffalo Gap and Riverheads.
So lets use Buffalo Gap as the example as the smallest of the teams. Lets give them 2-0 OOD. Lets also say for argument sake they beat the 2 "lowest" teams in the expanded district in Rockbridge and Waynesboro. That only gets them to 4-6, so they would miss the playoffs with this, and the records of the teams who would have beaten them this year:
10-0, 8-2, 7-3, 7-3, 7-3, 5-5.
Or go with the reverse of another team in same Region in Buckingham. Undefeated, 4 seed with 2 teams with a loss or even 2 ahead of them in Ratings. Thats because Buckingham played a TOTAL of 2 teams above .500, one of those being 5-4.
Or another example is the most likely team by discussion to play spoiler in Class 2 Region A is King William. They finished 4-6. Those loses were to teams: 10-0, 9-1, 7-3, 7-3, and 2 Class 4 teams who finished 6-4.
There has been lots of discussion in recent years about teams who have easy schedules vs. hard and a lot of times its based on district schedules. Just look in Class 4 at 2 of the 4 #1 seeds and their own fans talk about how weak the districts are. They could very well make the State Championship game and be the 2 best teams, but its obvious that people would be more impressed if they were playing in say the Seminole.
So while I understand the premise, to me it doesn't work because of these imbalances that can't really be fixed (more than just the couple examples)