New primal questions... Spoilers!!!

[Anonymoose]

We see enough to make that harder to believe.

I'm of the opinion that the Sahagin elder gaining the Echo and blaming Elidibus was foreshadowing of this outcome. Elidibus gives someone the Echo, Lahabrea nurtures an Echo user until she can merge with a primal, and then the two of them show up behind the throne together. As far as story structure goes, it fits.

What's interesting in Azys Lla is that we don't know what they were there for or if they accomplished it.

Ish. Incidentally. I believe the plan was to stop relying on primals as big scary monsters and start using them tactically in response to the Warrior of Light's interference. By giving a primal's power to someone with loyalties, ambitions, and conflicts, supported by the power of Azys Lla, the potential for sowing chaos was more than enough to convince them it was worth taking another shot at taking down the Warrior of Light and getting the Rejoining back on track. Thordan, however, turned on them and that plan de-railed itself, and then we set it on fire just for good measure, but it did weaken the Flagship's hold on the warring Eikons, and now the Warrior of Darkness is coming to clean up the mess Elidibus is left with now that he's lost the power of the only other Ascian of this world. Chaos and Darkness on the way - mission accomplished... ish.... in a damage-control-ey kind of way.

Why would Tiamat care about a fake Bahamut.

Honor and fidelity.

Bahamut was her soulmate, and in her despair at his loss she consorted with the Darkness and enabled a shade to wear his form as it went about playing a rather large role in the Ascians' plan to destroy the Crystal (the one her father has a pact with; the one I assume they're supposed to protect). Instead of dying strong and with dignity, she allowed his memory to be twisted into something villainous and hated and a symbol of everything they (and we) are meant to stand against. She murdered the legacy of her own beloved; she can't forgive herself.