There are all sorts of programs who don't get the most out of their talent - just check out the schools that were in/around the top 10 nationally in recruiting for the last 5 years. Georgia, USC, and Michigan come to mind. Jimbo's last few recruiting classes at FSU badly underachieved. LSU underachieved until last year. Tennessee badly underachieved under Butch. CFB, in my opinion, is littered with coaches who are good recruiters and motivators but don't bring much to the table beyond that. Peter principle. They aren't great tactically, aren't great developers, aren't great at putting together and managing their coaching staffs.
I think that's because most CFB coaches' core competency is recruiting and motivating, not Xs and Os coaching and player development. Not that there's anything wrong with that; actually you'd expect it to be that way because of how important recruiting is in college athletics. But it seems like most of the top coaches have good Xs and Os chops as well, or at the very least they are good at having people on staff who are good at that.
Dabo and Coach O I think are two prominent examples of guys who actually aren't great tactical coaches and wouldn't wow you with their knowledge of the game, but they've done a great job of putting together a coaching staff filled with guys who are great at that.