The more you learn about the generation of Gods that can before Caal, the more you'll hear that they in fact are not human in form. I never imagined the Weaver taking human form, that is below these elder, more powerful Gods. Some of them are just dragons
To the other question, yes Vurnak looked to the Weaver's perfect weave for inspiration. The Weaver takes the approach of total control, and Vurnak hates the idea that something Caal made turned against him. The "perfect form" is not that far from the Weaver's concept that everyone has a place in the great loom.