ok i have to bust this...
historically the soviets didnt have conscripts but reservists...
you raise good points but this part is simply not true. The Soviets like ANY other major power in WW2 made use of conscription. The Soviets conscripted nearly 30 million men.
1944 OKW should not have access to the same quality of mainline troops as the sov or any other faction if you went by history (also why volks in original design where worse AI than conscripts). The obersoldaten (silly name) are your 1938-42 trained professional last remnants of the German infantry. The game no longer reflects this as it made for bad gameplay,