Many thoughts
MSQ
One of my favourite dungeons, followed by one of my favourite trials, topped by Alisaie continuing TO BE BEST TWIN.
I had the same thought as Moose on the Alchemist being an upcoming job hint.
I'm not sure how much to make of this observation, but I wondered whether there is a link between the fact that the Convocation's memories were stored in constellation stones, and the fact that the memory of the Final Days is the starshowers. I'd need to go back and check my screens shots of the text to see if there's any links to be had). I'm still not sure where I sit between wondering if the Twelve are an echo of the Convocation or an echo of those who summoned Hydaelyn. The Azem /Azeyma / Azim (which is later speculated upon by Urianger in the Rising Stones) makes me lean towards the Convocation, but I feel it is up in the air. On the Azeyma link, kinda felt like a nice little link since I've been Sun Cat the whole way through.
I was very pleased we finally got a look behind the door in the Rising Stones, which I've personally thought has been overdue for several patches - I thought we might see it at the start of 5.0.
In the end, it is really very fitting that this is the Dark Knight expansion, because it's the expansion storyline that has been all about the WOL/D from the start.
As for the tease - I think we'll actually have these two (Zenos and Fandaniel) squared away before we hit 6.0. In the same way we didn't really get any hint of the Shadowbringers arc until most of the way into patch 4.4 (with the mission, The Call), I think there's much more interesting territory to be investigated than Garlemald, such as what it was that really caused Zodiark to be summoned in the first place - the cause of the Final Days, and also why the rebels went off to summon Hydaelyn - in the Anamnesis Anyder cutscenes, they talk about how the Convocation's solution will not work. It seems to me that Hydaelyn was specifically designed to weaken the power of Creation magics, by weakening the souls who could use them. All of that appears to still be in play.
Sorrow of Werlyt
The new arrangement of Penitus / A Land Long Dead that plays in Terncliff is lovely! But.... but.... My favourite piece of lore forum headcanon is now dead! It wasn't Nero that saved Gaius...
Valens... is a piece of work...