I really like that idea, I think it is fantastic and will really help making every game different.
If I may make a few comments:
-Your deep historical knowledge might be acting as a disadvantage. By that I mean that you guys might be trying to make too many cards. I do feel 3 cards at a time would be enough, per nation. The game is already very complex. Inserting 5 cards per nation, for a total of 5/6 majors and 3 minors will make the game virtually unplayable.
- I really don’t like cards which disallow opponents to shoot in the first round. That almost guarantees victory in small battles.
-Why not start with one policy (very strong avantage), and draw an additional general every 3 turns.
In sum I am in favour of simplification, otherwise we might end up playing an hybrid of Twilight Struggle and Axis Global.