Blizzard recently wrote a follow-up to the backlash they received from the Dungeon Journal. You can read the whole thing here, but I'd like to just highlight a few sentences.
That said, we have been listening to feedback as well and have trimmed back a little of the information. We also may consider (for the future) not documenting specific abilities for very difficult bosses like Sinestra, or heroic modes on final bosses like Ragnaros, or even what exactly causes Onyxia to deep breathe. Getting solid constructive feedback that we can consider to set into motion for change is always welcome and useful to us.
As I mentioned in one of my previous posts, I don't necessarily have any issues with the Dungeon Journal; however, I did have a problem with Blizzard stating that it wouldn't contain any strategy tips when it clearly did. There were also a lot of high-end raiders angered by the immediate inclusion (without gating) of all heroic bosses encounters. Looks like, for once, Blizzard was listening.