I would've figured the easiest solution would be have the system check the total number of areas in the country and make each area worth say 40 / # of areas (like forts and corps) while retaining the current 30 points max and 10 points min for area conquest. That way 75% of the areas would be worth 30 points and 25% of the areas would be worth 10 points... and all countries could be conquered. Not sure that this harms game balance all that much. Larger countries would be more difficult to conquer the areas sure, but as far as painting and counter-painting/paint-blocking it's probably about the same amount of player effort no matter how many areas, in my opinion at least. Maybe you guys disagree.
Anyway, I await to see what is done, if anything.