Demihuman Pantheons

Traditional AD&D cosmology gives dwarves, elves, halflings, orcs, goblins,
etc. their own pantheons, and these pantheons are more or less stable in
different worlds; Greyhawk and the Realms, as the "core" worlds, used them.
This was reinforced by Planescape.
Worlds that weren't intended as "core" settings--Dragonlance, Birthright,
Dark Sun and even regions on Toril (Al-Qadim, Maztica) didn't employ these
pantheons.
So: A debate topic for the list.  What should the role of these demihuman
pantheons be in Spelljammer?  Should groundling societies ignore these
pantheons, and just stick with their own?  Should these pantheons function as
the glue that holds the far-flung demihuman races together, functioning as
near-omnipresent deities beyond even the ability of the Church of Ptah?