[Buddahaid]

I confess I didn't read it all through but I like the idea. To me basically, you are describing a space battle game transplanted into an aquatic environment. That is very cool as most actual filmed space battles act as if they are maneuvering in a fluid environment, just not as thick of an environment perhaps. Never the less, that is the familiar reference all space battle films utilize.

Your fluid environment need not be planetary bounded, but could be formed by immense drops in space?

EDIT: The drops could, or maybe should, be man made as habitats.