Something that hasn't been broached yet but I think might merit a bit of story is whether and how Tyrians' view of Sylvari (especially the Norn and Charr) might be changing with the emergence of Jormag.
In HoT, the power of Mordremoth's "call" to the Sylvari was a major plot driver. It created a whole bunch of plot threads about whether any Sylvari could be trusted and how some were able to resist it while others heeded and became Mordrem. Laranthir and his band were kept at arms length and discriminated against, and it certainly affected our characters' interactions with Canach and Caithe. I'm not sure that those prejudices entirely cleared up even after Mordremoth's defeat; it wasn't a pressing issue in PoF, though.
Now that Jormag is using a similar type of influence on the Norn and Charr, I wonder if this will come up again - perhaps the other races will have more sympathy for what the Sylvari endured, or perhaps they will just shift to more of a belief that it is an entirely personal failing to succumb to an Elder Dragon? It would be nice if this were talked about, at least next time we see Canach and Caithe.
A tangentially related discussion point I was thinking was about Jormag's power vs. Mordremoth's. Mordy had influence in the sphere of "mind," he spoke directly to Sylvari to pull them into his command. Jormag seems to do the exact same thing though. If I had to describe the difference, I would say that it seems that Mordy uses domination - he commands, instructs, and speaks of fate and inevitability - while Jormag seduces, offering power and making it seem like you're the one getting what you want. I guess to some degree all the Elder Dragons have the ability to more-or-less willingly "turn" other creatures into their slaves (Kralk's branding it seems was entirely indefensible, while Zhaitan had to kill you first but then could control who/whatever). But is Jormag able to do this because of the blurring of dragon powers, or is this just an overlap of similar-type abilities?