This idea is relatively simple, but adds more detailed design.
It is, More Slabs and Stairs!
This simple idea adds a lot of more slabs and stairs to the game. Now which blocks become slabified?
Most of them!
Almost every full sized block (stone, obsidian, etc. Not long grass and flowers, etc.) will have a slab and stair version. Some that wont include:
(More coming if I find them)
This idea will allow for more detailed builds, especially with colored wool. The snow slab could be a second snow on the ground, for example if it snows twice snow patches over grass turn to half slabs.