Why do you think FFXIV is performing so badly form the content creation side?

[Vahlnir]

In terms of live-streaming, viewership is usually higher at the beginning of raid and savage/ultimate trial cycles, especially during the race for world first, or when the devs add new, bigger content, like PotD or Eureka (this may or may-not include copycat content like HoH or next phases, like Eureka has). Plus, PvP seeming to only be somewhat big in EU.
Right now, content creators who just live-streams don't really have that much to stream (I've seen a few branch out into other games). :/

Yeah. I think the main issue is that, while the content SE puts out is in my opinion decent overall, it doesn't have much longevity. That is where SE has struggled for years. People will either run things once and call it good, or run it till they get what they need and never touch that content again. WoW might not be perfect, but it at least keeps people invested. They know how to keep old content relevant by having plenty of incentive to return to it, even though people can steamroll through 99% of it by themselves.