This is an idea that's been around for a while. I know I'd love to have it. I think it's been avoided so far for because they weren't sure how to add it, and probably because they had other things they wanted to work on first. Rather than sharing a block with the regular slabs, it would probably easier to make a sideways crafting recipe.
Support, I suppose, since this is a highly sought after feature.
Support, I suppose, since this is a highly sought after feature.
[MCAPI-423] "Modcast"