Yes but the main subject is, in my opinion, that having a minimalist interior makes the ship better in terms of fight
that's ok for very small ships, but for medium-big sized ships it makes you feel you don't want ANY corridor/empty space so you will have a minimalist cabin even in a big destroyer (so it'll win over ships of the same size with only RESONNABLE interior (no decorations) like small corridor between cockpit, minimalist sleeping room, storage room)
When I say it's ok for very small ship, what I mean is a fighter of the size of a 200-300 mass ship is supposed to have quite only cockpit, or be unable to resist fire/carry big enough weapons/be sluggish campared to a ship of the same size. So that's the way I build them and I think a lot of players do core rooms this way
simple cockpit access:
http://img4.hostingpics.net/pics/220412starmadescreenshot0028.png
compact and useful cabin:
http://img4.hostingpics.net/pics/171899starmadescreenshot0029.png
ship core in front of the player and you go back to your sit when exiting the ship core so I like it and find it nice and handy even if it's quite ugly
If that's not OK for big ships is because in reality you CANT pilot a big sized water battleship in a single room, you need PLENTY of rooms for engines, weapons, etc, and corridors to access them (and your crew won't be too much thankfull for the rooms) even in a very small submarine (I don't know too much) you will still have a small main corridor between engines and rooms and controls right?
But I don't feel we need to add weightless blocks because after this no one (me included) would want to put a single "not weightless" block to make interiors or such and we would need a whole new set of blocks and colors
I think the game has to give us some mechanic with these rooms (engines, sleeping rooms, turret and weapon access, etc) so you'll want to put some "not weightless" block to make a room for it, and (because of this increasing your mass) you have to choose to what you'll restrict yourself and balance the size and the loss in weight/space compared to the bonus you'll get