Since nobody really addressed this, I'll give it a shot. Frost was recruited by and played for Bill Walsh. I'm not sure if you're familiar with Bill Walsh, but he's a Hall of Fame coach who won three Super Bowls and also popularized the west coast offense. After Walsh resigned from Stanford, Frost transferred to Nebraska where he played for TO. After his collegiate career had come to an end, Frost was drafted by the New York Jets where the coach happened to be a guy named Bill Parcels. I'm not sure if you're familiar with Bill Parcels, but he's a Hall of Fame coach who won two Super Bowls. Along the way in his NFL career, Frost was also coached by maybe a couple of guys you've heard about: Bill Belichick and Jon Gruden.
Thus far into his career, Frost had played for a guy who popularized the west coast offense. He'd also played for TO. I'd say he had about as good of mentors as one could possibly have when it comes to offense. However, this isn't where his experience stops. He joined Chip Kelly's staff at Oregon where he was involved in running the spread option. I'd say he's about as well versed in different offensive philosophies as one could possibly be.
It should be noted that Frost hasn't always been simply an offensive coach. He played defense in the NFL. One of his first coaching jobs was as a linebacker coach at Northern Iowa. Later, he was promoted to co-DC where his defense ranked in the top 10 in FCS. He's about as well rounded of a coach as you're possibly going to find out there. He played both offense and defense at Stanford. He played offense at Nebraska. He played defense in the NFL. He's coached both sides of the ball. He's been coached by some of the absolute best coaches in the business. He's the son of a coach. Plus, he's probably one of the smartest people involved in the coaching industry today.
Frost is currently in his second year at UCF. He took over a team that didn't win a single game the season before he got there. In his first year, he had them bowl eligible. In his second year, they are 4-0 and currently ranked in the top 25. One can't help but wonder if Helfrich would still be employed at Oregon had Frost stayed on as OC. In Frost's last year as Oregon's OC, Oregon averaged 43 points per game. The following year without Frost, Oregon averaged 35.
Frost is from small town Nebraska. He grew up a Husker fan. His dad played for the Huskers. He won a NC as a Husker. One of the biggest reasons Chip Kelly brought Frost onto his staff was to implement toughness especially amongst the WR group. Frost has seen us win. Frost made us winners as a player. I can't think of many who are more knowledgeable in what it takes to win at Nebraska than Frost. Everywhere he goes, the team he's coaching becomes a lot more physical. This is essentially what's been missing here for quite some time.