I agree.
Supply depots and rail yards throughout a zone would be awesome targets and would change up the strategic game play element. It would give us better ways to use heavy bombers than targeting specific hangars. I'm kind of tired of cherry picking individual spots down on a base with a B17.
We need to do something to encourage heavies away from tactical targets and onto strategic ones. Attack pilots would also have more fun, and it would force a defense of something that cannot launch any vehicles, nor be captured.