a buddy and I were just shooting shit as usual in village chat and discussing how almost all of the roofing materials are, then we had a real gem moment:
since there's already going to be colored bricks in the future (yellow ball clay, red acre clay, whatever, the way it used to be) why not allow us to craft colored pottery shingles out of the clay? it'd be sensible to cost 3 clay per tile and then require it to be fired in the kiln, and then ta-da, you can have an aesthetically pleasing roof material.
i'm amazed nobody suggested this yet. maybe someone did, but i couldnt find it by searching.