I would really like to see craftable devices to regulate gravity, heat and oxygen. -For gravity, some kind of gravity controlling device that effects a radial area making gravity greater or lesser depending on setting. -As for heat and oxygen, I propose a new mechanic: where you can fill an enclosed area with heat or oxygen. Like a heater heating an entire room as apposed to just in front of it. Quite annoying to have to huddle around a fire in close proximity to regain heat. Same goes with oxygen: an enclosed area (an area with sealed walls and back walls) that you can fill with oxygen for players to breath. Useful for moon and asteroid bases.
when the director mode comes along, I think there will be something like that in it, though, don't take that information as 100%. anyway, i hoped i helped in a way
For now there are placeable atmospheres that you can place on moons, asteroids. You can "control" the effectiveness by editing the file for the object. Same with objects that create heat.
Ah yes, Isolated Environments, I suggested the exact same thing right here http://community.playstarbound.com/index.php?threads/isolated-environment.62256/ I definitively am Pro for either a gravity field generator or perhaps Gravity-panels.