You can blather your BS all you want. It does not change the fact that when they announced the new Standard format, they said it would be 2 expansions and 1 adventure per calendar year. They have also reiterated this on several occasions.
http://www.hearthstonetopdecks.com/h...blog-coverage/Year of the Kraken is going to be over soon, are you happy with the current expansion release schedule?
They are evaluating the best way to release cards, e.g., through expansions or adventures. They are pretty happy with two expansions and an adventure each year.