POTD and PvP are what from my understanding killed the Fates. Take away XP from those and you would see people running fates again. SB is a giant leap in terms of hp/damage at 60 so it's either go to SB areas and hope you can survive the fates or run back to HW where you don't have to worry about anything other than a A/S rank popping on you, but lesser XP. After 62 you can run new dungeons until 70 with no issues and then of course daily roulettes. Fates in SB give quite a bit of good xp with buffs for xp but they're really hard to solo until the gear starts leveling out with the damage and defense of mobs. Fates from my understanding are pretty much just the books/NM's combined into 1 thing from XI and from what i've seen of 1.0 it didn't have any fates (could be wrong, not 100% sure on that).