That could be--that's why I entitled this thread preliminary conclusions. Actually, my proposal is for armor to move twice, not attack twice. My evidence in anecdotal - in my two PBEM games as the allies in 1939, I managed to destroy all the german armor coming into France. My opponents didn't even bother to rebuild it, they built air fleets instead. By using 5 or 6 air units to obliterate a target and then sending infantry through, they were able to finish me off. Call that "blitzkreig" if you want to - air power was a component - but in SC it is the only necessary component.
The land combat system in Class of Steel was excellent (admittedly, that game had a lot of other problems). But combat in SC seems dry, unrealistic and dull. Add to that the ability to BUILD an air fleet (or a battleship) is a single two-week turn, well, that's just silly..........