Spawning into your base at night, especially when no light sources are going, is incredibly frustrating because you cannot see anything but the HUD popups on your walls/floor/etc.
Would be cool if you could harvest the glowing crystals in the caves (currently un-harvestable) and make a 'glow powder' in the mortar and pestle, then use that with berries/water/charcoal to make a paint that gives off a very low level light source. This would let you apply it to your structures to see inside without a torch or other light source.