I would like to see....
More Modern Campaigns games
Some engine change to make urban terrain more hard to fight
The inclusion of some type of new hexagon to represent airfields
The possibility oif create your own strategic decissions within the game, IE, if the enemy have fortified itself in the other side of a river, it's the 100th turn, you have no more "standard" strategical decisions and you have an "idle" (IE, resting or not in the combat line) airborne division that was deployed in the second turn, then you could stage a paratrooper launch with their subsequent cost in supplies and so on...