Void Worship was a bit of an odd duck that described a general feel and theme, but didn't give any specifics on what to obey or what to follow. This rewritten form has more clearly set out "gods" while providing a lot of back and fro compatibility with other faiths, and Void Worship's own concept of Arkens spells, repraved rituals and such. Read more about it here: https://wiki.massivecraft.com/Void_Worship
Is there anything stopping worshippers from stacking blessings from these gods? Burn a few houses down to gain an immunity to fire, then gain the blessing of the maelstrom, then move onto figure of creation or something like that?
As far as I took it, its like the Elven Pantheon in a way. Someone could worship several but if they do they dont get the effects. The person has to be fully dedicated to their choice deity to gain the bonuses.