The Meaning of Life, the Universe, and Everything.
They should add a Block destroyer to minecraft it should be able to destroy every block in minecraft except bedrock. It would make it possible to make a completely automated cobble stone generator.
The way the Block destroyer would work is that every time it gets a red stone signal it breaks the block in front of it. The crafting recipe is
I posted something like this. I think the crafting recipe itself should lack the pickaxe, and as is would destroy the block in front of it at the rate of your hand. Right clicking would bring up a menu, in which you can insert a tool of your choice. So, the rate of destruction and the ability to mine obsidian or stone-type blocks would depend on there being a pickaxe inside. It would damage the pick, too.