I am not sure what progression happened that led to not only a team, but program that doesn't seem to know the least bit about returned punts. I looked up a few random years (90-92) and punt return yards varies from about 300-500. So just about a games worth of offense, maybe around an 6-8 percent loss of positive gain per season.
Somehow we've evolved from setting up great schemes and getting good gains (this does not include the opposition kicking away or out of bounds, giving up yardage, to prevent a return), to not returning punts, to being terrified to even field punts.
If you believe, as you should, that a program like Nebraska needs to fill in the margins, then we should be doing all we can to excel at every turn. We don't have the recruiting base to be mediocre at too many things.