Zodiark's Codex entry what do we think about it?

[Kozh]

Why were the Amaurotines, a highly scientific people who viewed their Creations as a tools, suddenly describing Zodiark as their 'God' rather than just another Creation?

Because zodiark isn't a mere "creation". Not just because zodiark is born from "imbuing the star by its own will", but also because its heart use a living person, aka Elidibus.

Why were more sacrifices necessary - was it to fuel the aether required, or because Zodiark was hungry and demanded it in exchange for cooperation?

Weakest bait I've ever seen. Next

What are the limitations of Zodiark's powers - could He infinitely generate new life in exchange for sacrifices, or did equivalent exchange/conservation of mass/energy/souls apply? If it was the latter, what was the point in more sacrifices in the first place?

Yeah you totally right, they sacrifice more just because it's fun. Not because zodiark needs more aether. Yup.

Were the Convocation acting this way because this was their plan from the outset, or did the summoning aetherically corrupt them in a way that rendered them His devout servants?

The trio unsundered has confirmed that they will not abandon their people no matter what, so take that as you will.

Who was intended to be the next set of sacrifices - was it vegetables, as was frequently posited by part of this subforum, or were these the other human races that occupied the World Unsundered outside of Amaurot?

There's no single evidence of this "other human race", but okay.

What does it actually mean to Sunder someone or something? Is it murder or mitosis?

Please go back to high school if you think mitosis works this way.