I know it's probably an insane anount of work to craft a map of such size and keep it good looking on this level of grpaphics, so i hardly expect it, but still wanted to ask.

Tropics, desert, and european rural locations and cities would do great thigs for immersion, for those are most likely places for the clash if it were to happen.
The quality of the units is top tier, but they look slightly jarring on dark and muddy wastes of war torn USSR