Story is subjective because everyone has a different taste. We already had a lot to do with Edda, thus the story around her and the palace moved me. Also the last surviving member of the group kinda finally got some closure. We also were able to save them. Did we get much lore about this? Not really. But we still know that somehow in this place lost souls wander around and meeting some of those NPCs and reading their bubbles really hits you. Nybeth himself was sadly not much explained but he seemed to have been someone that was trying to rezz someone he loved and also was the one that did it to Edda. Thus the emotional impact was bigger.
What did we learn about HoH: Its a really old training ground from an old Allagan group that somehow has forseen that the planet needs help somewhere in the future. Thus they use that building (why was it built that way? When was it built that way?) as a training ground that is at the end nothing but something that will split the great strong fighters from the weaker ones..they kill those that dont manage to kill the boss which completely ignores that someone can get better in the future (we would have been killed too if we went there first on our travels) and even if they might not help with a catastrophe, they could still have been useful for the rest of the community. Then we have that tree that is a projector, that tells us a sob story about two character we never met. And thats it. We have no real emotional ties to this story, one known NPC that still does not really play a big role and we only get a small bit of lore about this. (That feels utterly strange..)
Why should I not pick this one? The dog before that only is a challenge if you dont know the mechanic, which is also not a wipe but just need rezzes. As soon as you get that one mechanic you are good to go and nothing should hurt that much. And anything bellow that is barely worth to mention. Boss 80 is the second last boss and thus should have been a challenge and not feel weaker than even the 30 one. The only one that seemingly does pose a problem is the 90 boss. So one out of 9, with 6 of those bosses being in the hardcore part of HoH. I do see this as a big problem because this decreases the challenge imo. I mean PotD had Edda with her punishment if party members get hit by her aoes, which could be hard to get out of depending on where you stood. So the whole group would be punished for the mistakes of the rest. Nybeth was also not quite easy, especially if you did not have the right pomanders. Then you had Behemoth with his enrage. (And all of those are just from the casual part of PotD)