I've done the longer survey at least three times in the past. Maybe I'm just lucky? I don't know. It asks many questions and has a whole bunch of places to add comments.I would expect as much, I have just never seen anyone here mention being part of it, which surprises me with our many frequent cruisers. I have always had the impression from the shorter survey on the ship (without space to add additional comments) that they prefer to keep the feedback fenced in and controlled for whatever reason - maybe because demand was high enough that they figured they didn't need it. Even with the additional research, they still seem to miss some low-hanging fruit that irritates a high percentage of guests.
Change tends to happen slowly at large companies and with cruise ships, that's probably extra true. They can't change some things without dry docks or new training for the crew or new suppliers.