We are so weak at the linebacker position that going to a 3-4 base sounds scary. if we didn't have the linebackers to do a 4-3, no way do we have enough for a 3-4, even if you throw merriman in there. For a team that has spent so many offseason grabbing dlinemen, going to a 3-4 base will just pull away from that. If this coaching ensemble goes to a 3-4, and they put Kelsey at OLB because they dont have enough linebackers, I am going to lose my mind.
I am not sure what defense base they are going to run, but having two linebacker coaches is very telling.