Personally, I don't think it would be any bigger effort for us to switch to a decent 3-4 than what it will take for us to upgrade our 4-3. Right now, assuming Schobel does not retire, we still have glaring needs at LB and DE. I don't think Maybin will be an effective DE, so I am still saying we need a big upgrade at DE even if Schobel plays next year. If Schobel retires, then we need 2 DE's and a LB. That is not a pretty situation.
Now, should we switch to a 3-4, Stroud and Kyle can play the DE position. We move Maybing to OLB and Poz and Kavika fill two other spots. That leaves a hole at NT and LB. No worse than we are in our existing 4-3 and in better position if Schobel retires.
Now, I realize that the NT in the 3-4 is the key to success. So that is a huge hole that needs to be filled. And I don't think you can expect a rookie (i.e. Cody) to come in and fill that void. Raji didn't contribute immediately in GB this year, so I don't think we could expect that from a rookie. However, there are some free agent NT's that could fill this void. Wilfork, Hamptom, Pickett and Ferguson are all FA's (I believe). Any of them would provide at least a solid one year stop gap at NT.
Personally, with Maybin, I believe the 3-4 actually better suits our personnel than the 4-3 does. I think we could actually field a very competitive defense if we switched to the 3-4 this year. I think the biggest issue would be finding quality depth at DL and LB if we switch. We don't have a great track record of healthy LB's and we'd have virtually no depth on the DL if we switched.
I think this is the way to go if, and only if, we can get one of the free agent NT's in here. Any thoughts?