I didn't dig the time travel stuff at all. I thought everything that happened in Shadowbringers had already established that going back in time can't be used to affect the present. I guess Alexander shows that "closed loop" time travel works, but I still feel as though it creates a lot of plot inconsistencies. What other current events are a result of time travel plots yet to come? Did Hydaelyn know everything all along and just decide not to tell us? Or was it that "timeline convergence" that apparently only completed when we met face to face? Convenient. It just seems like lazy writing; a way for us to quickly learn Meteion's location by having Hydaelyn suddenly remember by a quirk of fate.
There's a few other criticisms I have with the MSQ with regards to writing (mostly with regards to pacing and several parts which felt contrived), but from a lore and internal consistency perspective there's a few other things that have been bothering me.
- It felt SO DUMB that the Thavnairians worked so hard and devoted so much of their expertise and resources to successfully creating an anti-tempering talisman, and then we learn a short time later that the Garleans created one by accident, without even realizing. They couldn't have come up with a better reason for untempered Garleans to be in Garlemald?
- When you arrive in Mare Lamentorum the Watcher says he has managed to repair one of the 5 destroyed brands, meaning there should be two still functioning. Yet when Zenos arrives he destroys a single brand which breaks the seal on Zodiark. What happened to the repaired one?
- Venat says her magic that she senses on us is a "traveler's ward" that prevents our aether from being corrupted (i.e. tempering), but it's the Echo that prevents tempering, not the Blessing of Light. It's already been long established that the Echo is not Hydaelyn's thing. I guess it's possible that the Blessing of Light also prevents tempering, but since the Echo seems to be somewhat of a prerequisite, it's kind of redudant, is it not? The point of the Blessing of Light seems to be protection against Darkness and the ability to absorb and wield Light to enhance one's own abilities.
- The reveal that the Ascians "programmed" tempering into modern-day summoning rituals as a means of perpetuating them, and that "original" summoning (creation magic) has no such downside. So then what was all that stuff Emet spouted about the Convocation being tempered by Zodiark? With the reveal also that Venat is not simply Hydaelyn's "heart" but one and the same being, for this to make sense it would have to mean that either Elidibus voluntarily tempered his brethren, or the Convocation somehow imbued Zodiark with the uncontrollable ability to temper, or that Emet-Selch was simply lying about being tempered all along.
I'm not looking for some theory that explains this stuff, because anyone can fill in holes with their imagination. These are things which I think the story should have addressed or handled differently but didn't, at least as far as I could tell. Some of them feel like actual mistakes.
I'm also left with the question of what exactly IS the Echo in the end? I know it's some kind of awakening of a sundered soul, but why does it prevent tempering, why does it allow communion with Hydaelyn, understanding of all languages and persistence of the soul after death? Is the implication that these are simply all traits that the ancients had, and the Echo grants them to modern day mortals? But then, the interaction with Meteion also implies that the ability to understand any language is in fact caused by dynamis and she can do it with us because our lower concentration of aether allows us to sense emotions/intent via dynamis. Shouldn't that mean that all present-day mortals are capable of this? Why is it only people with the Echo like us and Krile then?