I maintain that the Dawntrail story, despite being the lowest point for XIV story-wise, is still more coherent and competently put together than the best WoW xpac stories.
The problem is that WoW's story is largely like the plot in a porno: nice to have, but unimportant. It took things getting REALLY bad, plus some unassociated sex pest nonsense, to tick off WoW players with the story.
If XIV can bring the quality of the narrative back up to a level where the retards who don't understand narrative are clapping and baying like seals, they'll be fine. Will they hit the highs they enjoyed during EW? No, but that's for a litany of reasons.
And I would argue that DT is a bigger fumble than that. It was supposed to be setting the table for the next dynamic story arc and blahblahblah, only for the vast bulk of it to be completely irrelevant and the New World being completely wasted.
Compare to the (wrongly) maligned Stormblood where we got significant advancements in the Garlean and Ascian stories, including introducing a major antagonist (Zenos) who wasn't simply a villain of the week, other characters who played important/supporting roles (Emet-Selch, Hien, Fordola, Fandaniel) and generally advanced the story.
Dawntrail, what did we get? Sphene, most likely will be sticking around, and Calyx, who was introduced in post-7.0 content. None of the other characters that were introduced in the main MSQ are going to fucking matter once 8.0 launches. Trooncat and Lusts For Buffaloes will go off and have their quasi incestual (how quasi?) relationship, Bakool Ja Ja will be sent to the isle of broken toys to sit alongside characters like Hilda and Arenvald, and that will be that.
Going back to 'it's Ascians!' and interdimensional bullshit is a pretty poor effort at setting things up and a pretty significant failure given the relative importance of XIV's narrative.