I personally found act 2 the strongest one. I do think, that Ketheric is an odd chosen, since he switches gods like others underwear.
The way I interpreted Ketheric is as a competent mortal that the gods compete over. A bit like football clubs trying to score the top players for their team. So I didn't really see it as a plot hole.
Ok, granted, that is another way to look at it, though I would be weary, that he jumps ship in a crucial moment.
