I don't mind having 2 separates mods, it's more flexible this way i think. I just meant to say they fit well together. I wouldn't be interested in coal changes as they may more than likely interfere with other mods i use (Pyanodon or Industrial Revolution, although not both at same time :) ).
I second the idea to keep this mod only graphics, it's why i prefer it to Alien Biomes, which has compatibility issues with big mods.