You are talking about 1945, not 1944. In 1944 every forth infantry had an automatic weapon. They had some great tanks. They had Jet Engine aircraft, V1-V2 rockets. We also need to balance the game mate. And The game doesn't need to be reprogrammed, just change the gameplay.
Ma boy "At a conference in Tehran (28 November - 1 December 1943), agreement was reached between Roosevelt, Churchill and Stalin on postwar fate of Germany. At this time, have become widely known crimes of the Nazis, and public opinion throughout the world to identify the beginning of ordinary Germans with the Nazis. Requirements for Germany much tougher. Contrary to the original intention of Churchill to open a second front in the Balkans, was elected to the Normandy invasion [7] (p.168)
January 14, 1943, Churchill and Roosevelt articulated the demand for unconditional surrender of Germany and the Yalta Conference (February 4 - February 11, 1945), the Allies agreed on the establishment of new borders in Europe and Germany already under these conditions."
So if you want to compare do it and compare with Soviet forces amount/numbers, professionalism, types and quality of weapons and resources available In 1944.
May be Germany could withstand against USF for some time (if Soviets would disappeared somehow) but not too long Uncle Sam could increadsed number of USF trooops every month.
Later Soviet forces just steamrolled over Japaness army during 6 dayes.
All those cool devises that you mentioned above were presented in such a meager amount that couldn't influence on anything
What I am trying to say there is no reason to be historical Good example of good game Return to castle wolfenstein