As Elidibus might say,
"Correct on all counts." They definitely stuck the landing here.
Mystel girl is Chemist hint, almost for sure. I kinda wonder if they'll use time desync shenanigans between Source and First to bring her back all grown up as the actual job teaser in a future patch. That would probably be a nightmare for the other First NPCs though.
The cutscene in Dawn's Respite with the comatose Scions and Krile was excellently creepy. The low lighting really made the mood somber, which is something that we haven't been able to pull off in a while.
I love that they finally canonically gave the WoL an answer to the "Where did these seven other adventurers come from?" question. Have we always subconsciously been using Azem's power to conjure our friends forth from nothing for things like Susano or the Final Steps where they have no conceivable business being there?
That mothercrystal-flipping trial.
The post-trial scenes almost felt like a similar kind of victory lap as the post-Heavensward world tour quests, which are maybe my favorite line in the game. Great chance for the party members to get some development. Y'shtola winking at Runar gave me a good stroke, for example, and the bit with Seto made me go pet my dog.
Ryne hugging Thancred's gunblade before they left was low-key spectacular. Going back to the time-skip possibility, I wonder if we'll get like a teenage Ryne as a Gunbreaker at some point?
HW-outfit Alisae best Alisae. She's gonna get a dope outfit change in 6.0 and it's going to be fantastic.
I did kinda like how new G'raha is a combination of old boyish insecure G'raha and the Crystal Exarch.