I think they have so many needs still that they can focus on getting the most value they can out of the picks available and still end up addressing a need. Whether it's an offensive lineman, DBack, DLineman (tackle or end), WR and even LB (often the best special teams players - and Urlacher is going to need to be replaced in the not too distant future). Maybe they stear clear of QB and RB, however, teams keep drafting QB's all the time and then trade them once they've become a little established, providing great value, and RB turns over all the time.