Its just an ultra little request but it has an enormes consequence.
In Cryengine is a very nice feature that allows the Artist to do highlevel precise manipulation of the terrain: its called pull.
You can grab in a certain radius and then u can move the terrain segments up and down with you mouse.
I have a huge terrain with precise roads tunnels and stuff and i really would enjoy such function.
It would work similar like the other brushes but know the artist can just grab segments and manipulate them via mouse movement. Z only.
Nothing big its not even worth to mention but it would make editing alot more comfi.