If they can afford to go to Miami, I assume they can afford to fly. Your point stands though. Reducing the number of drivable away destinations from your schedule doesn't do anybody any good and takes away some of what makes college football college football.
This is one of the reasons I think the SEC will be more attractive than the Big Ten if/when any ACC members want to jump.
This is one thing that may end up saving college sports, at least for the SEC. If we expand, which we will, and if we remain the dominant conference, which we will, you could almost be like 'well the SEC is the only conference that matters'. And that might be true, which would not be a good thing. For example, having over 50% SEC teams in the CWS or playoffs isn't good for the game. Sure it's probably fair but still not a good thing.
HOWEVER......it may succeed in bringing back the regular season and rivalries, at least in football. If we bring Clemson and FSU on, well there you go, 2 more conference rivalries. We brought Texas and Texas A&M back, not to mention OU/Texas. Bring on North Carolina, boom, you have something there with Kentucky basketball (and maybe even football - the blue bowl or something, I don't know). Or maybe get Oklahoma State or Georgia Tech, rather than Virginia. It may or may not work, but I think that could be a saving grace. Basically I'm saying quality of matchups over quantity of eyeballs in the old system. In the streaming age, quality may win out over time, though I don't think anyone is truly thinking long term.