Continued release of NMs
From the latest letter of the producer. (and the outlines before that... and before that.. and before that...)

Well the "continued release of NMs" in 1.18 and 1.19 were unfortunately contained within other content (Dzamael, Ifrit, the Strongholds). I think this was kind of cheating personally by double counting your additions in different areas. "Oh look we made Strongholds AND NM bosses within those strongholds."

Maybe only being a couple weeks out it is too late to pull a Great Buffalo on us before 1.20, but what about sneaking one in for a holiday 1.20a surprise?

The addition of a few new (high level) Notorious Monsters with a few, or even just a single drop each; I think would go a long way to giving those players at endgame, and those not more to aim for and keep them logging in.