Dimensions and Deities

I was looking through the wiki on Pathfinder. It talked of a part of the world called the Great Beyond and all the spirits and alternate dimensions there.

Do you think that these places and spirit beings would play a vital role in the game world?

Also do you think they should or shouldn't implement such a thing? Why shouldn't they? Or how should they do it?

The gods will certainly have an impact on the river kingdoms, but the Great Beyond will almost certainly not be an explorable place.

I wouldn't mind seeing a dungeon where the basis of it is a portal a part of another dimension such as a part of hell were you slay some demons or something but... I wouldn't want to see it become a major design focus or have parts of the map be in other dimensions until the whole Inner Sea Region is in this game and the population density is pretty good.

So basically never based on the dimensions they are giving for hexes and how much of the map a hex covers.