I can't ever imagine him at an FBS level. He had some success at Juco by bringing in way more talent than everyone else...and he also failed in a huge way, while having more talent than everyone else...Maybe he could pull some good recruits at FSU, but I imagine they wouldn't go through the most extensive background check to be offered a scholarship. He didn't really look like he could coach on Last Chance U either...just put his hopes in crushing opponents with talent. He'd be on a much more level playing field, talent wise at FSU.
Even if he had a season or 2 of early success, eventually the players would start running the show and walking all over him, just like they did in Independence. I can imagine the controversies that would be coming out of FSU in short time, if they hired someone like Jason Brown.
Of course FSU would never actually consider this. Its a good publicity move by Brown to get people talking about him again.