I don't think it would work. Blizzard has set out to craft a very specific experience for players and too long of a content drought could really derail the experience.
World of Farmvillecraft uses a ton of analytics and metrics to determine how often they need to release content and how much user engagement they can get out of a particular patch. They look at things like how long the average player plays per week, how long it takes their target demo to clear current content and at what point in the patch cycle do these metrics break down.
They've used data over the last 14 years to come up with the current release cycle and I don't expect them to arbitrarily change that unless their data suggests that they do.