Thanks for posting, the author, Cavanaugh, has been around Husker athletics for some time, I think.
Couple of good quotes here:
"...he (Frost) also properly utilizes what is often a very difficult, yet necessary part of the sport: attrition."
"During the 2015 season, Nebraska had the most walk-ons dotting their depth chart out of Football Outsiders’ top 40 S&P teams. Ten of the Big Red’s 45 most frequently used players fit that billing, or 22 percent. Iowa was next at eight out of 42 (19 percent) with Wisconsin the next Power 5 program in this respect at 15 percent (6 out of 41). The Hawkeyes and Badgers have a system for development while Nebraska has been in a state of flux for quite some time, so this practice was far less forgiving."
System of development will be on full display the next couple of years as guys move through the program.