Did this last night. Superb problem, another classic prow for the burbage valley, deserves to be on everyones valley ticklist. I agree with the grade at solid 7b. Landing has a couple of blocks (nowhere near as sketchy as Boyager though) so a spotter would've been handy. That said I eventually managed to work a none slappy way on two of the moves which was fine with two pads and no spot.
Also added a circuit filler to the large boulder just downhill from the Monochrome block - Duo Bulge 6b - This climbs the overhanging left arete with two finger pocket from a sit start, swinging right at the top. Pleasant enough.