I was listening to the most recent bombcast and I thought this was a really good question that offered a variety of different ways it could be answered.
I personally agree with Brad and Jeff, and the whole crew that they can't keep doing the same thing and add minor bells and whistles.
I like the idea of a more overworld approach to shooters. If they want to stick with the military shooter it would be awesome to actually be able to experience the downtime between matches on base camps as soldiers or whatever class you want to be. Then in another mode you could be the commander and decide where the soldiers go and orchestrate different tactical moves and objectives that the soldiers on the ground would play through. Some commander on the other team could then order (offer) his troops to attack your soldiers and there would be all sorts of different sorts of objectives at your disposal. It'd be cool if there was some Eve Online type of stuff in there like secret attacks and espionage.
What do you guys think?