iif you read this column, you know that I have been saying they have been running a modified 4-3 for Ryan's entire run here. At least half of the game every week is either in an actual 4-3 (nickel defense on 3rd Downs and other passing scenarios) or a modified 3-4 where Ware rushes 88% of the time getting him defined as a DE in a 4-3 defense and the front 3 is just a DE and 2 DTs.
That is why I am somewhat amused by the universal freak-out about their personnel in a supposed change to the 4-3. Ware and Anthony Spencer are your defensive ends - just like they were at Troy and Purdue. Jason Hatcher and Jay Ratliff would be your ideal defensive tackles - although, who knows about Ratliff anymore. Tyrone Crawford and Sean Lissemore could play either in a depth rotation, and you were going to focus on DL in the draft anyway.
Linebackers are easy given your talent base already. Sean Lee is your middle linebacker (Mic), and Bruce Carter would look to be a fantastic weak side LB (Will). The strong side linebacker (Sam) may not be on your roster or it could be Alex Albright. But, as you can see, you have strong personnel that could be made stronger with upgrades, of course, but is not in dire straits as it is.