Surveys back before ARR launched, yeah. They might have happened, but not so much after 2.0 went live. Why? To keep interest in a 'dead' game that was being rewritten. I've looked at surveys from that time period. I have never seen one the 2.0 forums over the last 7 years.

Dev items on this Forum ... I think that SE decided spending a lot of time here saying "nope. not gonna comment" would have been shooting themselves in the foot. After all, if you can't say something nice [expected answer to question #2956 'How are Summoners, exactly, going to change in 6.0?'], don't say anything at all.

Why respond to a thread where people are laying out a whole new Healer regime when it has zero chance of arriving in game in that format? Why respond to a thread where players are redeveloping battle jobs, including rearranging oGCD/GCD rotations 'because it would be cool'?

Even a simple "thanks for your feedback" would be taken to mean "We're working on it".