@Der:
I think you are right on the infantry - although it was in the classic rules under production its too strong. How about “one new infantry placed in any territory you have controlled since the beginning of your turn” to represent conscription in outlying areas?
My thinking on the mobile V-2 bases is in late war they looked like this:

And here is a clip from Wikipedia:
“The missile could be launched practically anywhere, roads running through forests being a particular favourite. The system was so mobile and small that only one Meillerwagen was ever caught in action by Allied aircraft, during the Operation Bodenplatte attack on January 1, 1945”
And why would the A-bomb take an entire A/C carrier to move? The parts fit easily on a cruiser when carried to its assembly point in WWII.
Thats a German thing. I dont think the allies would be making German things.
Besides, i doubt the rocket truck would be able to blitz through and conquer enemy territory. Why cant it just be immobile? all the other bases are.
I think every nation should have a slightly different