Why the fuck did they make rebuff resist only available from a shitty high level dinosaur and not have it drop every time?
Because postgame grinding. It's an extremely powerful gem, so it makes some amount of sense to have it be hard to get. If you set up your gem crafting right, you should only need 4 copies of the crystal to outfit the entire active party and 8 copies to give one to everyone (which is convenient but not necessary), and those crystals can also give Double Attack (which you should have 3-4 copies of) and Unbeatable (which is good to put on everyone), so it's fairly productive farming. If you save scum the chest dropped by the unique version (Magnificent Digalus), you'll get enough of all three gems pretty quickly.
Xenoblade 3 Spoilers: YoukaiSlayer posted...
I don't think that's any better than just dying in the first place. Definitely not a solution by any means.
It solves the practical issue of "these people are no longer present in the universe," which is better than not solving that issue if we start from fundamentally valuing their presence. There's room to debate the philosophy of what it means to exist as a person, but this is definitely the best available solution to ensure that the worlds don't disappear permanently, considering what would be involved in "solving" unbreakable laws of matter.
I also feel like the game doesn't say most of that and it's just you filling in the blanks with headcannon.
That applies to a lot of this game. It very much employs a "show, don't tell" approach to much of its storytelling and worldbuilding, with things not necessarily being explicitly explained but making sense if you think about how everything fits together.
Why does origin have the power to freeze time?
A wizard did it. It fits well enough into the other omnipotence shenanigans shown throughout the series that I'm fine to leave it at that.
And if it does, why aren't melia and nia using that function to stall so they have time to come up with a solution that doesn't involve killing everyone anyway?
Maybe they don't have the power to access it. They are also mortal (exceptionally long-lived, but most of the reason they're still around now is because they were held in various forms of stasis), so "freeze time for everyone else until we figure out a way to fundamentally rewrite physics" isn't necessarily a safe bet, especially if maintaining time in that frozen state requires additional energy input (such as, from a synthetic world where people's life energy is routinely harvested to keep the system running).
Why does a desire to not die result in a world where everyone constantly dies? That seems antithetical to what Z should be doing.
From the perspective of an immortal god, nobody's ever really dying in Aionios (with the sole exception of Homecoming, which is uncommon and Moebius tries to avoid outside of a handful of cases that are used to motivate people). Sure, you end up collecting their life energy in chunks every now and then, but then they come back, so what does that matter in the grand scheme of things?
Mostly, that's the point: When somebody at the very top tries to maintain the overall status quo without caring about what it costs, those on the ground level often end up suffering on their more personal scales. Z's too detached from the individuals to recognize that outside of a handful of examples that he sees as validating his beliefs that he's making things better than they'd otherwise be, so he believes himself to be acting for the greater good.
If you are human maybe, but Z isn't. He is just a coalescence of human fear.
Into a human-ish form. A central theme of all three Xenoblade games has been to explore the implications of gods being limited by human thinking and weakness. Whether as Zanza or the Architect, Klaus was still fundamentally a human and made mistakes accordingly. Z is not Klaus, but he was created by the will of humanity (intentionally or otherwise), so it stands to reason that he'd fall prey to the same problems and idiosyncrasies inherent in that will.
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