I think we need to lay some of these arguments to rest.
This was a shaky defense last year that regularly fell apart. If they had pass defense rankings that were high, it was a combination of a scheme more devoted to it, and teams exploiting other areas, and maybe a function too of the kinds of teams we played. Kaaya didn't have much trouble throwing.
The defense is one unit, not two. They were not good last year, and they are still shaky this year. As Riley says, you need tangible results to start building that confidence.
This year they've traded, schematically, the pass defense focus for a run defense focus. Whether that was wise or not, we'll see.
As Nebraska fans we always talk about how great it is if you can run the ball well and control the game. You'd think more of us would see this approach and say "OK, yeah. I can see how we'd rather take our chances and make teams beat us through the air. And I can see why they probably will do well until the talent level is upgraded."