The only difference is that the reserves will be available to patch the holes and hold the front ONLY so long as he does not strengthen his forces in the West.
Nice cop-out. No, it doesn't work that way.
he would not shift his forces back to the western theater which (at the time is still quiet)
God, what can be there "quiet" in 1944? Assuming the Allies are pumping up their bombing campaign? The Germans might be misdirected, but they
would be expecting an attack.
A German Moscow in late '41 doesn't change the Russian counter attack
Actually, it makes a "Russian counter-attack" not only nigh unfeasible, but IMHO completely doomed. Moscow as a hub would be lost, the Stavka would be moved to Kuybishev. The Germans taking Moscow means they succeed in another
massive encirclement operation. Okay, their forces were exhausted, but you already twist reality so that they
take Moscow, which only means their operation is a success. The operation did not just include
taking Moscow, it included the demolishing of the Russian force. Same with Stalingrad. You're turning massive battles in German favour, and then... what? Counter-attack? With your platzdarms overturned and transport hubs destroyed?
The Reich would still be sinking the same billions into the eastern front they just wouldn't be losing as badly for all of it.
Cop-out. If you're not losing as badly, that means you don't
waste forces as you did in reality. Massive encirlements of '44 will never happen in such a scenario. Hell, there might even be no tomorrow for Russia, if they lose both Moscow and Stalingrad
without a massive encirlement of German troops.
The best our scenario allows for is a more stable defensive line that the Germans can hold for longer.
"Longer"? A force is not some abstract "time that we can hold". A force is a force, which, if applied, could overturn battles. You already overturned a few.
Transporting them through France will be all but impossible.
But they did transport them to the German border. If the Allies advance, there would be forces to meet them.
their ability to familairize with the terrain and be effective is doubtful
So? They're a force. Force redeployment from front to front is not the best thing, but it certainly helps if there's no other way out.
they will be relegted to showing up after the invasion has taken place
Which is still a change - there'd be more of them. And with Russians still out there, massively lacking forces, Nazis would not hesitate to throw everything into a counteroffensive on the Western Front. But this time, they won't fail.
The sheer volume of men an material moved ashore vatly outmatched anything the Germans could reasonably bring to bear
The problem is that "sheer" is a number. 37 divisions is a number. Should the Germans have exceedingly more, and gather them on critical points, there'd be no huge success. Going under naval artillery is not needed - the Germans just need to demolish this force faster than reinforcements arrive.
A force without a front cannot counter attack. The Germans in the late summer of 1944 were too disorganzied to plan or marshall for a counterattack.
"Too" disoranized? They may have been disorganized in the vinicity of the landing area. That doesn't mean one can just march his way into Berlin.
a crushing weight of allied power would have hit German troops who were unable to re-establish defensive line and would have invested the rear of the units not attacked thus bagging them by cutting off their supply lines
Which would lead to your own supply line to be stretched thin. It would be possible with an act of force to simply disrupt this line.
TRUE mobile warfare requires that you lessen your concerns about flank protection and drive THROUGH the enemy in order to disrupt his rear and force the surrender of his forces once they are deprived of logistical support.
True mobile warfare? Oh rly? The truth is it requires your own logistics to be on par with your force movements. If they are not - too bad, but you're not going anywhere.
Moreover the German troops on the frontier were at the breaking point. Given the chance to be free of Hitler's direct control by a severing of communications with Berlin there is every reason to believe they would have surrendered en mass.
Severing communications with Berlin on a whole front? Ridiculous. Even the Germans, however successfull they were on Barbarossa, could not wholly severe phone line communications with the border.
Such a quick strike would be in Berlin before a "counter-attack"
Well, now it comes to utter nonsense. It's over a good thousand kilometers. Your line would be stretched thin. Even a 200-km "appendix" would represent a supply problem. Before getting to "Berlin", your forces are simply going to get encircled en masse - and later destroyed.
ignoring that fuel reserves were so low that it took weeks of hoarding and planning to give the Ardennes offensive even half the gas it needed to reach Antwerp
Certainly. But why would fuel reserves be low, if the Germans are wasting MUCH, MUCH less on the Eastern Front?
Allied spearhead churned straight for Berlin or through the industrial heartland of the Ruhr.
A thin-stretched vector. The Germans made the same mistake when stretching out to Stalingrad. Outcome? Massive encirclement.