People complaining about leveling? Better do nothing about that. People complaining about daily quests? Better add a whole lot more of them. People complaining about no new dungeons? Better add more scenarios.
It's just an excuse to not have to devote time to something else, that's it. A game with this many subs and that much money, do you really think when they say "Do you want an awesome new raid or a crappy raid because we spent time on dungeons?" It's bull, and people buy it.
Personally I enjoyed the content in this game, but I absolutely hate how everything is being done in this expansion. They have a different 'mindset' and people are realizing how annoying it is. Their new "content" is nothing but the more of what I hate.