Catapult right click should jut up a block that was punched at. Anything (dropped items) or anyone that is standing on that block will be sent flying to the sky like how earthbenders normally do to themselves.
I feel like earthsmash shouldn't be a jetting plane-esque with passengers on it, because that's not how bending works. Either that ability should replace its technique with earthwave or an seperate for that must exist.
Another thing, I think earthsmash should put itself above the users heads, hovering. The User could then sprint towards its enemy with the earthsmash's rock following above him/her, with the limitation of only going straight line or only sharp turns and directions could be done otherwise it will fall to the side (Lin vs Suyin: reference).