BB is a don't give up the big play, make the O play without making mistakes and drive the field. Cooper mentioned the reduction in big plays given up vs. MSU, and they won. It's only going to get worse regarding teams moving down the field on the Illinois D, for better or worse.
If Illinois gets a strong proven DC next year that can "semi" take charge over BB, it will get better. Short of that, it's continuing on with what we've seen since Walters left.