I wonder if rather than changing the rules, maybe the conferences can consider trying a champions week format like the Big Ten tried last year.

In other words, leave the scheduling for the last week of the regular season flexible and try to match the best 2 teams in a CGG, and match the 3rd best team against the 4th best team, etc. Or if a conference still has divisions, match the 2 division winners against each other in the ccg. And the 2nd best teams in each division against each other, etc. You can set it up so that each division will be the home team in opposite years for non-ccg games.

You go with this format, you don't even need to change the rules for the CCG, because those rules are only necessary if you want the CCG to be the 13th game.