On second thought, because the Zombies 1942 setup was so janked up, we just straight up used the 1942 2E setup (so they are not identical, maybe 85% the same). UK is definitely weaker navally in 42 than Z42, and Germany has less land units in 42 than Z42. Maybe that’s more than the axis can handle. (Russia has 2 less land units in 42 than Z42 as well). My suspicion is that the setup differences wouldn’t quite address the uphill battle Axis faces, especially when the added units to Z42 are infantry which compound the turtling problem(?). I think all powers have added land units relative to 1942 but the Axis advantage there is minor.
Maybe a game with the zombies setup (but use the 1942 2E US setup) would change things a bit.