Basically, they are just slabs but have a similar texture and hardness as reinforced stone. Right now, the closest thing we have is the stone slab, and that is still a very different look. Also, our stairs should be as strong as our houses, right? What if a creeper swarm gets into your house and all of your weapons are on the second floor?
Ridiculous example, I know.
Recipe:
R R R = 6 S
R = Reinforced Stone
S = Reinforced Slab
Just like all the other slabs, except you get 6. I never understood why you only got 3. You are literally cutting the block in half. Why does the other half just disappear?
Also, as an alternative recipe:
T T T
T A T = 8 S
T T T
T = Stone Slab
A = Advanced Alloy
S = Reinforced Slab
Much more wasteful, but if you have spare stone slabs, this may be the recipe for you.
Anyway, please implement this if it isn't too much trouble.