The Packers do not have a 3-4 defense... they have a Dom Capers defense... much better than the 3-4 :thumbright:
But the bears offense has become a pass first offense and they will mainly be in nickel.
Also you have to be careful when talking numbers... as you talking about how it looks or when position they are.
Against the Bills the Packers ran a 2-4-5 nickel package but the way it looked was a 4-3 ... because on the line was two DL, Matthews and Jones. On the LB level was Barnett Hawk and Collins. It looked like a 4-3 but the players it had it where a 2-4-5...
So the Packers do run a lot of 4-2 looks out of nickel with the OLBers setting the edges and keeping containment (when their is no stunt called) so the 2 DL can focus on the 3 guys on the inside and hoping one of them will get a one on one and will win that battle, and get pressure up the middle as someone else gets pressure from the outside.