We are currently allowing more points per game (23.8) than any season under Meyer. Here are the scoring defense stats for each season under Meyer, along with scores of 24 or more allowed for a given season (I used 24 points as a cutoff because it's essentially our current scoring defense ppg):
2012: 22.8 ppg (28, 38, 49)
2013: 22.6 ppg (34, 24, 30, 24, 35, 41, 34, 40)
2014: 22.0 ppg (35, 28, 24, 24 (2 OT), 37, 24, 27, 28, 35)
2015: 15.1 ppg (24, 27, 28, 28)
2016: 15.5 ppg (24, 27 (2 OT), 31)
2017: 19.0 ppg (31, 55, 37)
2018: 23.8 ppg (31, 28, 26, 26, 49, 31)
So as bad as we may have thought last year was, we gave up more than 24 points only three times. The worst years were 2013 (8 of 14 games, or 57%, allowing 24+ points) and 2014 (9 of 15 games, or 60%, allowing 24+ points). We got away with the 2014 defense because we were scoring 45 points a game, and in fact we score less than 31 points in only one game (the home loss to VT in game #2).
Right now, we have allowed 24+ points in 6 of 9 games (67%), and we are not scoring 45 ppg like we did in 2014 (30, 20, and 36 in the last 3 games) to cover that. We also just allowed the second highest amount of points for this season to a bad--albeit improving--Nebraska team, on our field. The defense had better get markedly better by Nov 24th or we're going to get plungered.