You're this salty because they chose not to include certain side characters into the MSQ? I mean... alright?
OP said they were loose threads, and they aren't. I said in another post (that you conveniently chose to ignore) they're side stories, and some more side stuff after 6.5 would be nice, but that their goal (Restoring the XIIIth) has never been part of the "Save Azdaja, defeat Golbez" plot that 6.X has been all about. It's not a loose thread, it's just characters not being made as important to the MSQ. You could do this with literally ANY character in the game, and then we'd never finish:
- Why wasn't Kurenai part of the negotiations to bring Sui no Sato to the Eastern Alliance?
- Why didn't the Four Lords help power The Ragnarok?
- Why does no one in Garlemald remember Regula?
- Why is The Gration still parked in Azys Lla?
- Why wasn't Fran part of the Ilsabard Contingent?
- Why isn't Ejika helping in Sharlyan during the Final Days?
- Why is Matoya absent during EW other than one or two mentions?
- Why isn't Mikoto with the Bozjan Unit for Endwalker?
- Why doesn't Jenomis go back to Garlemald to help with the rebuild efforts?
- Why haven't Gaius and Allie gone back to Garlemald to help the people?
- Why wasn't Gaia with Ryne when the Scions left?
- Why wasn't Gaia with Ryne (or even mentioned) when we go back to The First during 6.0?
- Why isn't Y'mhitra helping her sister with ANYTHING AT ALL?
- Why wouldn't the Scions get involved in the YoRHa incident?
- Why are Hraesvelgr and Tiamat not trying to save Azdaja at all?
- Why did we go to Vidofnir and not Hraesvelgr in search for wisdom to give the dragons of UT hope?
- Where are Gaia and Ryne at all?
- Why didn't Emet and Hyth do ANYTHING about Pandaemonium?
There's more, and you could give in-lore answers to all of them, but here's the real reason: A character being tangentially related to something in the MSQ doesn't mean they have to be forced back into it every single time.
Sorry your favorite character isn't back this time. If I had it my way, Feo'Ul, Ryne, Gaia, Y'mhitra, Alka Zolka and Setoto would be permanent cast members, and I could contrive some reason to justify them being core members of the team, but again: You could do that with ANY character in the game. I'd love to see the sister dynamics between Shtola and Mhitra, but it's not MANDATORY for the character to be part of the MSQ just because she's related to Shtola, no matter how much I personally would love to see it.
All of that said, could we still see them integrated? Yeah, sure. It'd be fun, as much as I'd like them to stop ignoring that Gaia literally became Ryne's rock after her dad left.
PS: Literally have no idea why you're obsessed with PR lol