So the questions that still remain are:

What is the significance of the cave-in events that caused so much suffering in the past?

What is Greinfarr doing besides trying to be the Parade Hero?

Is "the thaumaturge" mentioned in the Alchemists Guild Corguevais, the thaumaturge who comes looking for you after you go asking about resurrections, or someone else?

Why does Ascilia seem to join forces with Corguevais after accusing him of murdering her father, running away, and genuinely expressing dislike of him?

Why does Corguevais make all this show of kidnapping Ascilia only to abandon her in Ul'dah at the end of it all?

And of course, who killed Niellefresne??? My only guesses is Corguevais (how'd he even get back there so quickly?) or some random other person who we don't see. Either way it's either the THM guild getting rid of someone with too much knowledge of the undead or Lolorito, trying to continue his quest for immortality as well as parley with the Garleans?