I always chuckle when I see so many people bent out of shape about this stuff.
These rankings are derived by how players performed last season (according to PFF) and don't factor in rookies. They're just being re-hashed for content reasons. It's essentially the same thing that was posted on ESPN earlier this offseason.
Let's face it, last year our secondary was pathetic. I think we all know the reason why, but it is what it is. Also, our LBs were underwhelming last year as well. As excited as I was, and still am with Ogletree, he was something of a liability at times last year. If you followed him in college, you know that there were going to be some growing pains. He was a playmaker, but he lacked consistency in all aspects of his game. Laurinaitis is what he is, a decent MLB. Dunbar was not good last year after he returned.
The only gripe I have is their interior DL rankings, specifically Brockers. I really want to know what their criteria is for grading these guys. If a guy commands double teams, he's doing his job. Quinn doesn't threaten the sack record without Michael Brockers eating up linemen.
That said, it's pretty silly to use last years content/rankings to make a predictive article. But they need page hits and bad content never kept other large sports sites from succeeding.