With Walker now in the fold the Bills top 4 DTs are pretty much locked in place. What concerns me is that there is not a 300lber in the bunch. This would be o.k. if the Bills had a T. Harris/W. Sapp type of player, but that does not appear to be the case (unless McCargo develops quickly). I will admit that I wanted the Hawks to get Okoye because he has the potential to be a Tommie Harris/Warren Sapp.
The history of the Cover 2 is that it is an effective defense when you have (1) a premier DT (i.e., Sapp/Harris) and (2) a linebacker with safety speed (i.e., Urlacher/Brooks) OR an unstopable offense (i.e., Indy).
I hope Marv and co. know what they are doing. The draft will be critical to rebuild what is now a gutted linebacker corps.