Seems like you're writing off Richard Rodgers. I actually like the chances of Backman more than Mitchell Henry.
What could be more GOOD and NORMAL and AMERICAN than Packer Football?
It might have to do with a lot of subpackages, and McCarthy often talks about matchups and exploiting them.
If you go back to the 2010 SB run, Aikman/Buck talk a few times about how the DCs have trouble keeping up with all the substitutions made from one play to the next.
https://www.youtube.com/watch?v=Gb4zVkCkuNE