I've done it once, and that's it for me. The same problem that has befallen all other bosses with the exception of the executioner has been present. 200+ players crammed into one instance in a game that can barely handle 24. Created insane lag, minimum 200ms max over 9000. And if that wasn't enough, because of the strangely optimized shaders it drags FPS to a crawl, making it nearly impossible to attack at a normal rate. Funcom seems to refuse to address the instance size issue, which is strange... There's no need to have a multi-million HP boss that takes a crashy amount of players to kill. Seriously, it would go down faster if the boss had twice it's normal amount of HP and instances were limited to 50 players. The only incentive to blowing up your computer in the name of a world boss is that Legendary quality cape they're dangling in front of our noses.
My 1.24 cents.