Didn't Blizzard release TONS of information right after MoP was confirmed? I remember that they even did videos where they showed off every single dungeon/zone that was going to be released. Every day they released screenshots and new models. I go in here every day just to check if it's been released some new information, but nop.
It would be nice to keep us updated. They have only released a few screenshots of half done models since Blizzcon, it has gone 3 months but still nothing.