Alright, so I built a bit today. Finished a room, and now I have this very cavernous empty space. Naturally, I don't want to waste something like this by dividing it into rooms, but I will if I really have to.
Cargo hold is out, that will go in the underbelly of the ship. I was thinking about an energy conduction core. It would essentially take the energy siphoned from the power core and redirect it to the various areas of the ship, mainly the weaponry and the soon-to-be-implemented Yamato Cannon, the ships main weapon. I've no damn idea what the hell it would look like, though.
Any other suggestions of different battle/weapon related rooms?