I can't help but feel the same. As much as a pleasant surprise the story was for Pandaemonium, I still feel like that it just doesn't compare to the heights of other raid series in both design and setting. Maybe it's just my overall fatigue of ancients/ascians but despite liking the story it just couldn't hook me the same way other raid series did. As others has stated, even when it's outdated content, the Coils is still truly in a league of its own. Spiral is still one of my favourite tracks in the whole game even after hearing it for the first time years ago in PotD before I unlocked Coils.