I realise the feature set for BFTB will now be locked, but for future versions of the game I wonder if it would be possible to implement a system similar to that in Take Commands 2nd Manasass, where we could opt to control a force lower down the command chain.
For example, in a divisional sized battle, command a single brigade, or even battalion. The friendly AI could take over the big picture as it does with the opposing AI, and when an order came through for the force being commanded (after the approprate delay) a target marker could be placed on the map, with instructions on whether it's a move, assault, defend, etc.
I think it could be really fun to feel like a small part of the big picture. I suppose you could choose to ignore your orders and do your own thing, but either way, it could lead to some interesting decision making. It would also be nice to have a big battle going on, but be able to concentrate on managing a smaller force.
Anyway, just an idea. I would have thought that the AI in Panther's games would be one of the few able to carry something like that off, with little modification to the code already in place.