Here's where I disagree with you Bill. How can you call anything Levy's done a "losing trend"? They picked DBs in his years as coach because they kept losing those players (to injury or otherwise) while they were able to retain the winning core in a pre-free agency era. And his years as HC were the best the Bills have ever seen. As GM, he has had one year and one year is never enough to indicate a trend.
And if you're willing to cite Marv in the personnel choices during his HC tenure, what about Jauron's influence, then, as well? Surely he had some say in choosing players like Urlacher, Ian Scott, Alex Brown, Lance Briggs, Todd Johnson, Charles Tillman, Rosevelt Colvin -- a lot of solid guys, and not just CBs. In five Jauron era drafts, 6 first day O-and D-lineman were chosen. In the only year they didn't take one they landed Urlacher.