So, what would be your reaction, if you found out, that come cata realease first patch, blizzard were not planning to release any new instance, only extend the wings of existing instance VoA style but with more detailed trash also.
And there you thought you were going to get 4 new instances every patch. Oh no, you get one new wing, and the final patch of the expansion is where you'll get to fight the likes of Ragnaros, Al'akir and Neptuolon in the final wings. The only exception is the Deathwing and CoT WotA raids.
Now how does that make you feel?