And for the role-player in all of us:
How about 1kt "luxury" components? You know, high quality officer's quarters, an on-ship bar, civilian quarters, observation decks, heck, maybe even a Zee-Gee pool.
Maybe even a brig, or diplomatic quarters, or something that wouldn't need a whole lot of space, might not have a practical in-game use, but would at least give us the satisfaction that not a single kiloton of potential space is going to waste in any of our ship designs.