The MCH rework in ShB is indeed good, and got rid of procs entirely. I definitely recommend it if you're interested in a highly mobile ranged dps without procs.

I disagree that RDM is heavily proc based, at least compared to DNC/BRD. It's somewhere in the middle of how impactful procs are to a job's damage consistency. E.g. I can run a du.geon as Dancer and have less than my usual dps due to sheer bad luck with procs and vice versa, but I always get
very consistent dps numbers with my RDM.