So you are saying that ESPN will pay at least $28 million for the non revenue sports that they already own? I was under the impression that ESPN owned almost all of the media rights (excepting coaches shows, radio broadcasting and the like). If they didn't, what would stop UNC from monetizing their "Tier3" games and starting their own network? This is what The Big12 did when The LHN put an end to The Big12 Network. If I remember correctly, ESPN bought The ACC's with the last contract so they could put the big non revenue games on ESPNU.
Let's say that they held back those games, how would ESPN make money on an ACCN if they gave each school at least $2 million more and take content away from ESPNU? Fox is itching to get their hands on as much content as they can and already owns the Big East. ESPN has to decide if they want to play with The Big 10 (I personally think the media will be split between Fox and ESPN) or lose that content as well. They are already losing money (or breaking even) on The LHN so they wouldn't lose them to Fox and either the Pac or The Big10. The ACCN may happen, but it will be bundled with The SECN and The ACC schools won't see as much as you would like. The exposure is priceless, but the money won't be as much, if at all.
Another thing - If you are thinking the Florida schools will get more than the others (or FSU/UNC), than The ACC is dead conference walking. Nothing splits apart a conference faster than a conference automatically giving more resources to certain schools and not others. The Big12 tried it and it almost fell apart. Now, I know you will say that Michigan makes more than Northwestern, and they do. Michigan charges way to high prices on a stadium that holds 115,000 fans and make much more on their non Big10 media (radio broadcasting, coaches show, merchandising licensing, ect). Not from the Big10 media payouts, though. Yes, Nebraska, Rutgers, and Maryland get less of a payout, but they are buying their way in and will receive equal payouts eventually.