GrauGeist
Generalfeldmarschall zur Luftschiff Abteilung
The Luftwaffe is not going to fly at low altitude just because some historian says the Eastern front was a low altitude war.
The airwar on the Eastern Front was focused on ground attack.
Since the Soviets moved their manufacturing beyond the Urals, there was no strategic bombing campaign like there was in the west.
Additionally, the Axis and Soviets were operating from foreward bases almost a stone's throw from one another - this is why combat altitudes rarely if ever exceeded 15,000 feet.
Think about it: if the enemy's positions were literally 15 minutes away, why would they need to climb any higher than nessecary?
Both sides were heavily involved in ground attack which involved tree-top altitudes with fighter cover roughly a few thousand feet above that - the defenders would be perhaps just a bit higher to both spot their adversary and have the height advantage.
So you have planes at maybe 150 feet, escorts at roughly 1-2 thousand and defenders at perhaps 3-4 thousand feet.
Bombers (both sides) would stay at heights just above mobile flak (only very strategic targets would have heavy flak replacements) and these altitudes would have been around 8-10,000 feet at best. Factor in their escorts being around or above and the defenders within a few thousand feet above.
The Eastern Front was a completely different type of war than existed in the West.