I would be interested in hearing JasonC's take on how the Soviet situation in 1941 - "stand and fight" orders, reserves withheld by the rear instead of tapped into by the front, officers cashiered for perceived cowardness, etc. etc. - compares to the German situation from 1943 onward.
My perception is that Hitler and his staff overextended their not-fully-mobilized war economy in 1942, and when the tide swung against them, lost their daring, flexible strategy / tactics, and started the very same follies (giving stupid, unrealistic orders like "stand and fight", and chashiering smart officers because they were unable to make them into successes) that enabled their early successes - with the same disastrous results.