A couple of things to consider for the new version:
1. Altering the rules for Tundra:
There really needs to be a global rule that greatly reduces movements when traversing Tundra. I would suggest that it consume 3 or 4 full move points to move in Tundra, meaning that even with the Woodland bonus for Infantry, they may only move 1 tile. The tundra winter-equipment bonus for armor/mech inf would allow for mobilized units to move 2 tiles, instead of one. Obviously, rules for roads would still super-cede.
What needs to be altered:
Basically everything north of Trodhiem (Norway), Helsinki (Finland, and Leningrad, running along an east-west axis, should be Tundra as the tile-base. Most of it would in turn also be forest or hills, and the marshes could stay marshes.
Basic global rules: Tundra costs 3 movement points. At the moment, i don't think there is any change, but could it be as simple as modifying it the same way desert takes extra move points?
2. Supply routes TO Suez (from India/Australia)
UK - should get regular supplies of units, infantry, armor, and artillery regiments, one every 5-8 turns.
3. What's the deal with Iraq?
UK loses them as an ally, but Germany doesn't gain friend status, and both can just cross through their territory? The last game with Germany i played a southern strategy and tried to invade Russia from the South after heavily moving a ton of units to Africa to roll through - but i couldn't take any of Iraq and Iran was first an ally than it wasn't. I know this is traditional roles for them based on the calender, but at what point do things deviate from the plan?
4. A railway from Vienna to Greece. At the moment, there is barely a road and it runes through Albania. Should there not be railroads that go from Greece to Bulgaria as well? OR even through yugoslavia?