If I were to single out two issues with the current set of dieties, it would probably be the following:
1) The deities in general seem rather disconnected to each other. I am fine if say, the Elf gods maybe don't have much connection to the human gods, and so forth, but in general all of the gods seem to be sort of removed from the majority of gods, except for one or two relationships. Versus mythology, where they tend to cluster into families with more complex relationships with one another
2) I admit I really the underlying cosmology of petitioners and quintessence and how outsiders are made. I think more compelling stories are possible if the dead retain their memories after judgement: They know why and how they are being punished or rewarded, they can reunite with loved ones or even enemies, and there is a potential that they can go on and become an outsider to aid or directly challenge the PCs.