Final Fantasy XIV: Heavensward was a tremendous expansion, all things considered. It brought in a whole new storyline that was worth getting invested in, new classes, and tons of additional activities including a raid. But that was back in June -- MMOs need to constantly throw out content to keep people interested, especially if they sport a subscription fee.
While XIV is more packed than a lot of other titles (if you choose to dig into PVP, crafting, and RP activities), the worthwhile, meaty content dropped off sometime after the introduction of the Savage version of Alexander. While patch 3.1 is a stop-gap of sorts, it brings in a few brand new concepts that will help breathe some fresh life into the game for a while longer.