My friends and I have alot of time to think when its dark in game so we have some suggestions for craft-able items.
Oil Lantern - (suggested cost) 5 Metal Ingots - 1 Oil - 2 Cementing Paste - 2 Crystal : Same light radius as a Torch, perhaps abit less but with a much longer lifespan. It would be repaired by adding oil.
Crane/Lift - This suggestion may be taken care of by the eventual implementation of Elevators. Some way to physically transport goods up by construction vs flight.
Suggestions for Added functionality:
Allow light sources to be equipped to large saddles: This would let you equip a light to a saddle like you would an accessory to a gun.
Torch: Same brightness/duration as if a PC was holding it
Flashlight: Same brightness as the accessory on a gun
Oil Lamp: If implemented as suggested it would have a brightness/duration equal to that of a PC holding it.
Rex Roar Idea: When roaring as a Rex have it scare off all nearby non-tamed herbivores and lesser non-tamed carnivores. It also can cause nearby Rexes to head towards your location.