Yes, the material editor should be expanded but UV mapping is way out of scope. Changing the applied textures and loading custom shaders are the things to add but I don’t think that it’s the purpose of Neo to go much further into modifying 3D meshes. There are better utilities for that (Blender :D).
What would also be important is an import plugin for Blender so you can modify Maratis meshes without having to store a *.blend file somewhere. That would make the material editor much more useful since you can use the changes you made in Neo when continuing to work with Blender.