I'll try to keep this short and to the point:
(I'll start with a scenario)
You are talking to a friend who's playing somebody else at the time. You want to see how the game is progressing, to see how your friend is doing.
Currently: You have no way to do so through the game. To see what's going on, you have to get updates from the player himself, which takes time (which the player needs to plan).
This gives a slight feeling of being enclosed in a box.
Suggestion: Obviously, in a game where a lot is based on guessing your opponents moves, location, and maneuvering, seeing both sides of the map is out of the question. Friends would then be able to be spectators, and tell the side their routing for what the other is doing.
Then what do you do? Have a text based spectator system.
What does that mean? Instead of watching the units move on the game map, you only see the map itself (with all the Hexes under the "fog of war"), and you get messages which say "X's fighter destroyed Y's artillery". (Maybe even have the attacking and defeated unit show up momentarily (similar to when you are attacked by a unit out of your vision).
Reasons: As I said earlier, it's a rather nice option to see how your friends are doing. It will also help develop the community in this game, since you will then be able to indirectly participate in other games with your friends.
Thank you for your time,
Great work so far