Allow me to smash my pick against the wall of ANY cave biome for a small chance at ANY ore.
A better chance to get whatever is normally in that cave. (Have it like fishing , but for rocks)
Put stelagtite on ceiling like Mayo you can shoot and when they hit the ground spawn 1-3 ore nodes.
Just let me take my pick to a stellagmite and sit there whacking for hours instead of playing high-speed wack a mole for nodes. (Its more realistic and will save my sanity)
Perhaps have me upgrade my pick in a mining related quest to be able to gather all the types of stone from the walls.
It could be fun !