Hi.
A small issue that bugs me is "Purge the unfaithfull" wonder, it seems to me it's coming too soon, sometimes even before all religion are founded.
I thought it should come together with a late religion tech.
I think so, too! Normally some AI builds it before I even have more than one religion (if I want an early one) in any of my cities or even when I don't have any religion anywhere at all (if I want AV/Order).
(And to Hyborem being a central character: This is FFH, it's about the Apokalypse, so there needs to be a "devil" avatar.
Of course if it's easy to implement a switch would be ok, but you can always disable the tech yourself in the editor so he is never summoned).

maybe it is best to add an option, disabling Hyborem from the start on, so people can play a light-game with all the other cool fire-stuff like seperated attack/defense, magic types and all the new units, without necessarily have to deal with Hell.
