The issue being is that hunts are not well designed when scaled with the number of people that attend them. There are plenty of stories of people not being able to see hunts; players not loading into the zones quickly; character and animation culling.

There's also the question I feel often gets overlooked: "Are Hunts actually fun?". Sure, you are rewarded quite well for your time, but I feel a good measure of a fun system in an MMO is would you go do it if there was little to no reward for doing so? Take the Hero's Gauntlet for example, the dungeon is exciting to do, so I've done it several times knowing it is not an efficient use of my time. I've played Rival Wings mainly because I find the game mode fun and accessible. Would you undertake a Hunt because it is entertaining though?