About the nature of the world of ffxii

[Wolf Kanno]

They aren´t Gods but the soul of an evil man that lives on Ashe´s time and planned ahead his future Godliness(a.k.a the true villain of FFXII).
They aren´t really separate entities but different instances of the same entity.This is a nethicite effect.They aren´t omnipresent ever.They need mist (solified or gasified) to walk in the world(and through time).This is seen on the many "Rasler" appearances.

I'm intrigued to hear who this "evil man" is and how you came up with this theory.

Even the Ultimania stated very little on the Occurians only mentioning two by name. I know they are not "true gods" but I feel if they had the time/space manipulation power, they would never have had any problems with Venat or need of Lady Ashe. The plot kinda falls apart if they had powers that reach into those realms.

Do you think that SE should have provided more details on some aspects of the XII , Occurria for example? I had a feeling few times during my gameplay that SE wasn't able to fit in all the details they wanted and that some dialogs ended too early...

Its true XII was rushed and pretty ambitious. The main writer said he had some issues with the team agreeing about the course of the story and I feel its most apparent in the end. The Ultimania explains a few things better but it hardly adds anything; except it actually explains Basch and Noah's falling out.

I feel the major plot issue is really how much Lord Vayne changes between sending Gabranth to the Pharos to the actual Last Dungeon. Before, Vayne seemed like an anti-hero and almost a suffering martyr for his high goals but by the last dungeon he suddenly transforms into your usual megalomaniac with a god complex. The Ultimania describes his true personality being the former, as an idealist fighting for his brother and humanity.