I don't personally think their focus shifted drastically in the specific instance of Makeb. Makeb is supposed to bring a level cap increase, which to me means more class story. I could be wrong here, but if you're going to add enough content to raise the level cap, there better be story content. In the game so far, every planet you went through had class story, this should be no different.
They've stated that Makeb will not add any class story, only planet arc that is shared between everyone, like every other planet has. That's why people are getting worried and/or angry.