This would be technically possible and could make sense for very static terrains. The problem with UVs is that voxel terrains are difficult to unwrap to a 2-dimensional map. Instead of this, Cubiquity uses tri-planar texturing which is much more robust for our needs. Of course, you could still do the texturing yourself using the Cubiquity example.
Since implementing this feature would take time away from getting the primary features working, it would have to be something we defer until the future but do remind us of it and if there’s enough demand, things might be moved around in priority.