Though its hard to argue against the 2006 OL vs the 2018 OL. In regards to the DL, Bronco was putting Nose Tackles in the NFL every time one of them graduated. One of Bronco's great underrated skills was developing NTs. The reason the linebackers were so successful under Bronco was because the Dline ate up blocks so well. I can think of 4 or 5 DLs Bronco coached before there'd even be a debate with one of Kalani's Dlines.
I will agree with you about the Corner position though. The trend of the talent at Corner is also looking better than it did under Bronco.