Makes sense that Dahlia lost her role as a Tower Functionary given she can't fulfill the role anymore. At least we won't have to worry about the replacement on this run, the last time we had to deal with a replacement (Malia Lustra) she gave us some headaches last floor. Depending on how things shake out, I suspect that the role of Demon of Gifts will also be replaced for the next run, but again not a concern for us now.
As for the Domains to go through next, I think Lydia and Quincy will be most manageable for our party. Lydia would be ideal for our next one if possible, since she'd help with Yulia's birth. Given her role of protecting children, I don't think she'd even put any strings on ensuring the safe birth of Yulia's child. Quincy using tech means Maple and Sally will be able to fill the role of dealing with traps, in addition to our usual suspects (Isalia, Lri, and Beck). Depending on the nature of the Domain, it may even have a similar system of charging items as Iralia did, which would let us use all our tech. Morgana might be the worst choice due to there likely being a wide variety of monsters that we can't predict that may have gimmicks that counter us in unexpected ways. Jasper will likely be tough too, but at least we've seen a good bit of the Tower's magic by this point and would know what to expect.
Since we've got arguably the best source of info in the entire Tower on our side now, I'm curious about what Dahlia can tell us about Malia Lustra. Is there any chance that she (or any of the other Archdemons besides Dahlia herself) could target us on this floor? Or is this floor now out of their reach since Dahlia is on our side and it's otherwise ruled by the Functionaries? I'm also curious about the identity/nature of Malia. The Abyss was really set on making Yulia the new Archdemon of Lust (although this seems to just be par for the course given Dahlia and Dreg killed their predecessors). Even after Malia appeared, she still seemed to want to put Yulia in that role if I'm remembering the scene last floor correctly. Is that due to pride, or is there some kind of restriction on Malia that came from being created in Yulia's image?