Gundy is smart enough to realize he's at a place where expectations are reasonable. That has likely factored into his decision to remain in Stillwater. In that regard, he's the opposite of Dan Mullen.
It will be interesting to view the reconfigured Big XII after the new teams have been members for several years. As long as the Big XII continues to have an opportunity to compete for a spot in the CFP, the incoming members (BYU, Cincinnati, Houston, UCF) should help that conference. For the most part, they haven't been able to compete against other P5 programs (recruiting, media rights $$$), but that will gradually change once they're in the Big XII.