Downloaded 7.1 beta to open Cr2 files from Canon 5D Mark3. Onle real hitch I have found in using the adjustment brush in Raw. With flow and density at 100%, minimal feathering, and brush hardness 100%, notice a lot of "speckling" where the affect has not "taken"...i.e., with an exposure at -.5, several areas will only be partially darkened. Multiple passes will improve, but this is not consistent with behavior of previous versions. I do not know if this is restricted to exposure, as most other setting, clarity, sharpness, noise reduction etc. are less distinct in their impact. Hopefully, issue will resolve with release of full update.
Do you have Auto Mask turned on?