I'd like to see an emphisis on more strategic targets. For example:
Rail yards - Most supplies traveled on rail. Create a circle or railways in a given region. It's one job to defend it and another to disrupt it.
Supply convoys - Generally we only see them at the base or a barge, but never a large convoy sneaking across country or a large formation of ships making its way up and down the coast to supply regions.
Submarine Pens - Granted we don't have submarines, but these were a necessary target that impacted shipping and supplies.
Aircraft factories, Tank factories - We all know that the 8th Air Force focused on Messerschmit and Focke Wulf factories to name a few. I would increase the importance of this.
Add more of these and increase the weight of importance for victory. Doing so, in my opinion, will increase the strategic thinking and flow of the game and get away from the furball ho's out there.