This is an interesting point, and one I suspect we'll see clarified in the expansion. Ramuh muses that Light and Dark might've been given form when man was born—which also might be his explanation of the Sundering/the summoning of Hydaelyn and Zodiark. Ramuh could also be not knowing what he's talking about. That Light and Dark are primordial forces seems likely and I look forward to how the information is finally concretely presented to the adventurer. I'm not entirely sold on the Mother/Fathercrystals being independent of the manifestation of their primals (if this turns out to indeed be true) since both Bahamut and Alexander had a crystalline core and were particularly powerful Primals. That Hydaelyn and Zodiark are Primal beings strong enough to possess crystal core seems equally likely, just on a case heretofore unseen/documented.
I would be on board with all of this until 4.5 dropped, tbh. The timeline we're presented with now regarding Val and the Dawn Warriors means Emmerololth was destroyed either before or concurrently with Nabriales, really. Elidibus and Lahabrea make a big stink about "that which should have been unending" being destroyed and what not when the Warrior of Light finally offs Nabriales but Emmerololth was destroyed by the Students at Val either relatively soon after or before (since she was present in the Chrysalis scene and Val's disappearance with the intent to destroy her and Eureka happens somewhere around 2.1 according to Urianger saying he's incapable of reaching the Students of Baldesion; this means she's simultaneously missing since 2.1 but present in 2.3 but also dead somewhere between there).
I'm less sold on Emet-Selch manipulating the Garleans past the War of Succession just because he seemed keen on taking his nap, but I concede it's equally likely he just says that to get Varis riled up. I also want to learn a lot more about Solus and the founding of the Empire and his rise through the ranks before definitively thinking Ascian aether also runs in his bloodline (because there's a lot of things I'm worried about if Ascians can interbreed with mankind).
My apologies! I saw your reply and grabbed it immediately.The fallibility of Primal knowledge shouldn't be glossed over, you're right. It feels so weird that every Primal knew and couldn't comprehend this though... unless, of course, it's by Ascian design than the rites of summoning were taught to lead to 'incomplete' Primals and thus they're unable to lay their mark on those "blessed" with the highest form of Tempering.
I'm very hesitant to think of life in the greater universe and prefer to stick closer to our Shards, but I definitely feel like the Kuribu and Winged Lion being based on aliens doesn't seem right. As for time dilation malarkey, I feel they've all but explicitly stated it with the idea that whole 'in that place between worlds time and space themselves bend and twist,' and we've known Unukalhai to be stowed away in Elidibus' pocket for at least 5000 years. Perhaps the 5000 years, for him, was only a few—which is why he's still immature (mentally, not physically though that is true too). Reconciling Sin Eater iconography from the Fifth Astral Era with the voiceover claiming "a century" definitely feels like it needs addressing.
It frustrates me to no ends she has a set of Chekov's eyes and does little with them. If there isn't a single line in Shadowbringers that brings this up to say she was unable to see it for some reason I will be SO CROSS.