Roughness For Terrain Elevation and maybe a Brush for Roughtness.

The Terrain Elevations we have are interesting, but saddly, i'm noticing a pattern that all mountains, ravines and many other interesting elevations, end up beeing REALLY "noisy" as in, having a LOT of rough terrain.
Could an slider of how rough the terrain do you wish to be, be added?

Maybe even an roughtness brush,.
We have a smoothing one, but what about an oposite? What if we wanna make that flat plain field have some roughtness terrain as if you had used the "Hills" profile.