There's no question that what they were able to create this monstrous flywheel of engagement around a strong core concept but from my vantage point (read: I know they printed money with FarmVille and CityVille and have more or less floundered in the past year), they were only really good at the "let's take this already successful concept/hook and turn it into a cash cow" side of the equation.
Has Zynga had any successes in the past twelve months? Were they able to break into mobile at all beyond paying $180M for Draw Something?