BYU always has a lackluster secondary. May be once or twice in the last 30 years has BYU had a truly quality secondary. However, BYU's defense doesn't rely on the secondary, but the linebackers - and we're set there.
BYU's DEFENSE will be much better than Purdue, Rutgers, Northwestern, Illinois, Southern Miss, and South Alabama. A little better than Miami and Iowa. Nebraska will score between 23-31 points.
BYU's OFFENSE will be WAY better than everyone on Nebraska' schedule except perhaps Michigan St. and Wisconsin. BYU will score between 24-42 points.
Nebraska wins if its defense can find a way to slow down Hill and the Go Fast Go Hard scheme. Otherwise, it's a BYU victory and BYU's defense will decide the margin of victory.