The most "story driven" MMO currently on the market, by most reasonable metrics, is TOR. It is usually described as MMO KOTOR not merely because it's Star Wars, or that the acronym is TOR, but because each of the classes gets a carefully crafted storyline with branching paths, romances, multiple endings... basically all the usual stuff you'd expect from a single player Bioware game, which is also their main selling point. In fact, one of its chief faults was, supposedly, neglecting the MMO portion of "MMORPG".
TOR had to go F2P because it was just not sustainable with a subscription model.
Surely there is no shortage of Star Wars fans or Bioware fans or KOTOR fans to draw on as a userbase, but the numbers TOR puts up still pale in comparison to the reception of FFXIV 2.0. Why is that? It seems very obvious to me that the FF aesthetic is the largest part of why people are playing this game, because if MMO players cared as much about story and roleplaying as some of you seem to believe, TOR would've been much more successful than it was.
This is why all the hand wringing and justifications over "lore" and "roleplaying" ring hollow to me. You're essentially arguing that this game would see the same amount of success if it was made by any other developer as long as the story elements remained intact, even if all the FF references were replaced with an original IP.
That just sounds absurd. Doesn't that sound absurd? I'm sure none of you are arguing this, but this is what I'm reading, on the most basic level. That FFXIV 2.0 acquired millions of its fans through its focus on narrative, and thus it shouldn't be skippable, because it's the "selling point".