Maybe because dungeons is the essence of every MMO game, people love to explore, see stuff, fight against different bosses in the same cave/house etc. We waited and asking for fun dungeons since HW, with puzzles, traps, side quests inside the dungeons that gives you additional goals, make the reward worth the time you spend there. What do we got? They just cut off one dungeon, so we can run one with AI and that's means no engaging content for 4 people whatsoever.
But I was taking about overall problem with the game and it's lack of battle ideas, circle/square arena with stand there dodge this and stack up mechanics is kinda lame after you see it 3 expansions in a row.
Forum not a place to talk about those things though, but at least I see more and more players that start to criticize the game, that's a really good thing. Stagnation is a degradation.