schedule that BYU's pass defense ratings from last year were closest to. Those 3 games would've been Illinois, Rutgers, and Purdue. In those 3 games Armstrong completed just 50% of his passes (32-64) with 447 total yards (149/game avg) and threw 4 TDs and 4 INTs. If I were a Nebraska fan that would have me worried.
BTW, BYU had a much better run defense than all 3 of those teams.