Great break down by the guys at Corn Nation and how CU adjusted at the half and NU's O didn't. A lot was predicated on, as posters noted, delayed and disguised blitzes. Also new and inexperienced OL making the wrong calls/reads based upon the "look" of CU's defenders. Also mentions a NU lineman who "lunges" in pass pro (and did last year) that DC's have picked up on. Good read and suggestions IMHO. Unsure how long it will take to shore up, but explains a lot of the offensive miscues.
https://www.cornnation.com/2019/9/11/20859894/nebraska-football-colorado-loss-plays-key
https://www.cornnation.com/2019/9/11/20859894/nebraska-football-colorado-loss-plays-key