That being said, I think they really just focused on Noctis and his journey with his friends and what that meant for him. All this lore/underlying mythos is flavor in that story but not really 100% necessary to understand what the game was trying to convey....Noctis coming of age and accepting his fate.
Pretty sure this and they were running out of dev time. Nomura was not scrapped for shits and giggles.
Actually kinda liked it but yeah if you want to see more then what Noctis and the Chocobro's only experiences it's just not there.
Hopefully some of the dlc will flash it out glad the price of the season pass ain't to bad. But dlc should honestly not be used to flesh out or finish stories, the big complaint from me is the parts where Noctis his friends are away for a while and not explained why or what they did are clearly dlc bait.
Still fantastic game but that thing seriously makes me kinda mad. Ignis is suddenly blind but how? Gladio suddenly gets some scars while he was gone and did not even tell Noctis what he has been doing. The Prompto one where he falls of the train is kinda okay expected him being captured anyway.