I place the confusion on the conundrum of pass coverage of three wides, or an athletic TE who will be split out.
The Steelers would stay base in many nickel situations versus 3 x 1 personnel because the base 3 D line could pressure and get home (including Hampton). At least one, if not two, OLBs could get home. Plus one of those OLBs and the safeties played good coverage.
For the Packers, especially absent Collins and Wood, the 2-4 is about coverage options and match ups. The pass rush, even with those guys, was still middle of the road, especially 4 on 5. You could blitz Wood to good effect. Whether by attrition or film, this became far less effective over time. Coverage by safeties got worse and pressure by the D line declined.
The new D line is longer and leaner even with Daniels starting. Daniels showed something last year and Jones has looked effective in getting pressure in this preseason.
If they can become the pass rushers their predecessors did not, then you could see more base and more D lineman (which you would hope would be better for run D). Capers might trust his coverage with base to hold IF he is generating pressure with the front 5. If not, its still going to be nickel to matchup and an unknown for run D.
But I think Capers has shown that for him 2-4 is about coverage, not pressure. Its going to take a marked difference in pressure to alter that plan.