Sorry about the uncreative title, I'm a little tired but not too tired to suggest some ideas.
Everyone knows you can make glass by smelting sand in a furnace, but me and probably a million other people thought of making glass by setting sand on fire with flint and steel.
Many people should know that you can make chain armour with literal fire blocks, but I've been thinking of a new craft recipe for it using iron bars because that's the closest to chains I can find that are still iron:
and so on..
Actual STONE Slabs:
I'm not saying to replace the original stone slab because the stone slab is unique and good with building but they should add actual stone slabs and rename "Stone Slab" to smooth stone slab. The actual stone slab should look how you would expect:
Sorry about the double stone slabs. I was already in 1.7.10 so...
The first one is supposed to be like in a furnace.