Icons look frigging sweet but seem out of place for the story you laid out, would the US military not of made any advances? Background photos look OK but the same as icons. Some of the smaller territs look like they might just fit in the army numbers now, what about the small version though (EF6, EF7). I know it is early, but any thought on this yet?
Why are all of the attacking armies the same... Icons-would America sell to there enemies? Armies, would Mexico have an army the size of Russia's? Maybe have different icons for each army, if not, at least the enemy.
EDIT: Had a thought or two coming back from the kindergarten just now, how about spreading the attacking armies all around America, and secondly, give each starting position a different amount of armies. So one might have 2 bombers while another would have two fighters. This would give each one its own unique play. Lots of ways to play it then, and a bigger headache for nole and ian.
Lastly, how about removing the American defenders as anyone player who gets these will end up being annihilated. Or you could have no American defenders but place a spy for each army in America. Give him a range bombard so he can see over a large area in fog games, huge decay so any armies placed on him get wasted at the end of the turn, but have him not being able to be attacked. You would have to have a losing condition then, but that can be easy to sort out.