I think this is a good topic of discussion. A lot of people on the draft board think we could use a good SILB so Mayo can play WILB and roam sideline to sideline. That's why there's a lot of talk of McClain, Spikes, etc.
Since he basically became a two-down player in 09, anyone else think if BB and him mend the fences that AD would make a very good two-down SILB? I think he could be pretty effective for us as a SILB, and would allow Mayo to roam sideline to sideline more. Guyton could come in on 3rd downs as a coverage guy. McKenzie can be eased into his role instead of being thrown into the fire a year off ACL surgery. As we've seen, it often takes a good amount of time on the field before you are back to normal, which can be seen if you look at some of the struggles of Brady and Merriman to name a few.
I'd think AD inside, given his pass rushing history, would also give us more opportunities to blitz our inside LB's on some A-gap blitzes to really collapse the pocket. He seems like he's built to stack and shed at a mammoth 6'2 270.
It's pretty clear we need to upgrade OLB and hopefully get something from Crable. I don't think AD would be all that happy with this position change, but I think it could work. If you had a rotation of Mayo, AD, Guyton, and McKenzie, I think that's pretty solid. You can address OLB via FA/Draft. Just kicking around some ideas.