This is the only thing I can add to your post. In the last game against GB, they did almost what you suggest. They essentially ran a 4-2-5(Nickle) almost the entire game, thus removing Bostic from the game and Briggs manning the middle. You would think that our rush defense would have suffered by displaying a front 6 vs a front 7. It did not. We had been giving up around 200 ypg in the weeks leading up to this, with a season average of 161ypg. We gave up 160 to a hot rushing team with one less body up front.
Now, on the converse of that you would think playing a nickel defense all game long would mean our pass defense would be pretty good against a rusty Aaron Rodgers. Over the season, we gave up 233 ypg passing and decided to give up 315 in the finally, in bad conditions, for a total of 475 yards. How does that happen?
I was there to witness how horrible our scheme was. And believe me, if Rodgers hit any of several opportunities he missed or didn't see; we would have been blown out. Comparing the QB's, Cutler was far sharper, as he only missed one throw that I saw. Rodgers missed a good 10. Our DB's were so far off the ball, GB had that 6 yard quick slant all day if they wanted. And we were in nickle coverage! Of course he may have adjusted that for the playoffs had we won. I was calling for that in the 1st quarter. Just a fan in the stands, what do I know?
He must go...