I do wonder if the BIG10 looks at the South Florida market and sees all the Northeast and Midwest transplants and thinks they already have a lot of those eyes on TVs. And that adding it won't be as big as one would think.
I would imagine the SEC would think the same way, that with all the UF and FSU alumni in South Florida they don't need to add Miami to have the market share.
Honestly, the reason to add Miami would probably be more a national exposure, which Miami can pull in when it's good, than a regional one.