Hmm ok continuing my vocal thoughts here...
If we have the capability of making a mission like the ones used when you do a MP convoy commander game, but yet make it a single player mission, that presents a problem of needing an AI sub to fire torpedos and stalk your convoy. I didn't even think about that.
In multiplayer obviously the sub's are player controlled, but in the single player environment this takes us back to the age old problem of not having torpedo firing AI subs in the game.
Hmm, the potential for massive surface battles is still there though. Think Battlestations Midway. Obviously very scripted, but man is it good for "fun factor" A far cry from a "simulation", but something to consider. And with the "addon" and what it contains having been announced, think of controlling surface ships, AND calling in for air support etc?
That seems very doable even if torp firing AI subs is not. Hey if you can't have a dozen donuts, take half a dozen!