Does the 650b randonneur bike community consider any production 650b randonneur bike a success?
The Crust Lightning Bolt? Even that had a fair number of complaints...
The V1/V2 Grand Randonneur were plagued by the same issue as every other production randonneur bike of that era - most of the people in a position to review the bike were doing so from the perspective of moving down from custom bicycles - or - the bike as their first experience with low-trail. The weight, ride quality, and build quality issues were real but much less relevant to someone, who was at the time, comparing against other more normal $500 steel framesets. The shimmy and handling issues are more relevant but also more personal. An overabundance of negative feedback for many years from one person has created a perception of the V1/V2 that didn't match most people's experience. The bikes were fine, there were some QC issues but it wasn't a bad design or execution overall.
The V3 is a much better bike than the V2 but from what I can tell all the randonneur desire was effectively captured by gravel and bikepacking so there isn't really anyone left to champion the much improved bike. Which is a shame. I probably wrote 10,000 words when I put together my low-trail Fog Cutter back in 2018 but wrote practically nothing about the V3 Grand Randonneur despite it being a better design.