My approach to playing bluegrass rhythm comes from playing in a pre-bluegrass duo, a bluegrass band, a country band and many old-time country bands.
The solid bass note and strum can truly define a band's timbre. I think it's easier learning to play loud and hard and then toning it down rather than learning to play with a "light" right hand and then trying to make it louder. The muscle memory works better the first way. Power to the rhythm guitarist!