this sounds really cool, nonnie! my biggest suggestion is to find another way to refer to the premise than "post religious" though because that brings to mind something very different from what you mean by it

it sounds more political/faction scifi/fantasy-ish? i'm sorry i don't have better suggestions, the idea of the false god being a monster and the fall out from that is awesome and should be the main draw, but there has to be a better way to express that