I stand corrected, the NCAA can count on one person to watch their games. I'm sure Doritos would pay a fortune for that advertising time.
You can't credibly argue that it would be worth showing FIU v. Auburn as opposed to Auburn v. Oklahoma or Ohio State (8 team playoff) or even v. VT, Ok St., or Nevada.
That is, however, what you are arguing. The problem is that argument is completely blown to shit by the NCAA bowl ratings which conclusively prove that people (besides yourself) don't get a rat's ass about mediocre college football games.
Case in point, every bowl game but SEVEN last year drew a rating under 5. Twelve of them drew ratings under 2. Another nine drew a rating over 2, but under 3.
Compare that to games like the Rose Bowl, which involved TCU who is not a big draw. That game had a rating of 11.26. The Florida-Penn St. Outback Bowl that didn't even involve ranked teams put up a rating of 7.
Fans simple aren't interested in watching the champions from crap conferences play, unless those teams happen to be undefeated. The NCAA isn't going to dilute one of its biggest brands to bring you FIU in the first round of the football playoff - they'd much rather leave it open for the Notre Dame's and runners-up in major conferences.