If I'm Purdue and my conference affiliation is 85% about my biggest revenue sport (I know, it's not), then in a world where every conference champ is in, my ass is moving to the MAC and I'm winning 8 of the next 10 MAC titles, cashing that fat check year after year.
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@MaximumSam, your idea is lovely, but it's fantasyland. It actively ignores reality and wouldn't yield results for decades. We don't even know if football will exist in 2050, much less the near-infinite other aspects of this that we don't know.
It also perpetuates the lie that currently exists of matching programs on very different competitive levels and meshing them together. Those 5-12 and 6-11 games will be annual beatdowns....they might as well be nicknamed the Hunger Games.
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Even OU gets chided for its poor showings in the playoff now, and it's a top-3 all-time program. Winning the MAC in your proposal is rewarding a good season with a public execution, year after year after year. Until one day (many years down the road), it suddenly isn't.