Because we all know it is really expensive to come up with this kind of pieces and put them on mail. And the PR department really has hands to work on the core features of the game.
Learn what you criticize. They have new content coming out and they're using a form of promoting that they used before.
As for the usual hating comments, no the game doesn't needs to be rebuilt from the core. It has a very solid and working core. They need to improve performance and stability obviously but the core works and many issues are going to be improved with 1.3.