I wouldn't say they kicked the shit out of Auburn, it was a close game and Auburn actually finished with more yards. And it was a meaningless bowl game for Auburn, I don't think they were too motivated to play a mid-major school after coming within one game of making the playoff.
If UCF had played a full Power 5 conference schedule with those 2 and 3 star guys, they probably would have been .500 in conference play. I think Frost did a great job there, but history shows that you eventually need the 4 and 5 star guys if you want to compete for a National Championship. Just look at Clemson, Dabo was doing just OK until he started pulling in Top 10-15 recruiting classes, and since then they've been in the National Title hunt every year. I also remember Pelini saying he would "put his own stars" on players, yet we saw what happened when he no longer had Callahan's recruits.
I don't expect Frost to pull in those type of recruiting classes right away, but 2-3 years from now he needs to be. There are too many other great coaches in this league to think he's going to outcoach them with inferior talent.