In fact this is only a side effect of what they are really doing. Which is, stretching the little content they create to so many applications that the player feels he's given a huge chunk of content, or that Blizzard actually cares about his prefered gaming style. If that was really the case we would see multiple new raids, dungeons, scenarios, world events, etc. with each patch, at least that should be expected considering all the monetary and labor forces Blizzard compiles compared to other developers. Makes you wonder what they actually do all day.