Yes a block and kind of like a craft table where we could mix concrete ingredients (like sand, cobblestone, and gravel) for a variety of other blocks. Of course it would require coal, charcoal, or a bucket of lava and water to operate.
Everyone has different tastes, personally I think this is just strange. Are there not enough blocks already without making some weird concrete things? But, like I said, if you like it then thats all you haha