5 Texture sets are very limited, and the hassle of setting each option of Sediment, Ground, rock, etc. can be improved upon by moving towards a material system, where instead of Terrains that have 5 preset textures and materials, single material that can be interchanged.
More example, using The grass material from the Desert terrain set, and combing it with the Road material from the Store Asphalt terrain material. I would love to be able to just drop in textures and create new materials and have terrains that contain many various textures and not just the 5.
