This is pretty much the Texas model ... same sized schools all grouped together in a district. The all-in part wouldn't necessarily matter that much, but might actually cause some grief. The thing that makes Texas where folks don't really care about the conference stuff is because only the top four teams in a district advance to post-season, so the end-all and be-all is the district. Also, Texas is so large, that it's not necessarily an issue finding enough teams of the same class for a district. My old alma mater in Houston belongs to a school district that has 12 6A schools and, for a long time had a state district for football that was almost entirely comprised of a single school district. If you went to districts in Indiana, with an all-in, I'm not sure the district would get nearly the focus that it does in Texas; whereas, at least IMO, conferences seem to have focus/interest besides the post-season.