Otherwise know as two conferences. Who the heck would want a 20 team conference? If you get to the point with two divisions of 10 teams, you effectively have two conferences or the world of college athletics circa 2000. The law of diminishing returns comes nto play at a certain point and the ACC with 15 in BB is pretty damn close. The NBE at 16 was there. Look at the bottom feeders/suckers in the uber sized leagues and look at how much they add. Their ROI is negative and they negatively impact earnings for the better teams. Not sure any TV contract would pay for 20 teams when 30% of the teams suck. Based on your proposal, Vandy, Rutgers, NW, Indiana, Purdue and ILL (and right now UCONN) would fulfill the sucks definition in football. 30% of a 20 team conference not to mention the scenario if they end up unequally weighted in the same division.
But I will take a breath and let you explain the very, very interesting comment.