I think the decision to run a playoff might be the OHSAA's to make, but rules that attempt to force or encourage teams down to 8-man would be the members to make.
The schools that have been playing 8-man are staying 8-man thus far, so hopefully that assists with the growth across Ohio. Ideally 3-4 conferences in various corners of the state would be good and we would then have the OHSAA running a post-season tourney.
If that means 11-man going to 6 divisions, who knows. Don't be surprised even if 40 go 8-man, 7 11-man divisions remain.