Unpopular FATEs suggestion.

[Creativephobia]

Its a good idea on paper, but what you'll likely end up with is people doing "the current rotation" in busy zones like Coerthas, and only hitting up those out-of-the-way fates when they've let them despawn several times (for the sake of argument, say every 2hr). It'll be similar to the dungeon fix of 2.1.. You'll get people doing the events again, but only because it yields the best return for their time, not because there's anything special about it.

Then you'll get raging players shouting in zone threatening to "report" players for "griefing" their xp rate by doing these fates before they've despawned 4-5 times, just like people raged about players finishing unpatched Dark Devices early.

I mean let's be honest. Aurum Vale room #1 parties are the closest thing you can get to XP party camps straight out of FFXI. After all the whining and complaining about having more stimulating content to level on, the people interested in powerleveling are still using the path of least resistance just as they always were.