Thanks for the response! I appreciate the commitment to a historically accurate map. I personally think it would be interesting to have a distinct Minoan culture, but ultimately it's your game. The "one true faith" concept is interesting, maybe there could be economic or political benefits to getting in good with a particular faith? I'm a fan of those roguelikes that have special powers and codes of conduct associated with different religions, but as this is a pretty grounded game I understand why you might not want to go that route (plus it would probably be a ton of work!).
I wasn’t sure how many people would want there to be diversity with religion in the game, but I can definitely do a system where you would pick a god to be the one true god, or maybe a sort of free for all where every god exists and they are fighting for unilateral control, or just a no god option, and yeah if there was a one true faith you could choose, there would be bonuses to the followers, or in the case of every god existing, all of them would have small bonuses and the bonuses would scale with how popular that god is, codes of conduct would be something like a god of war demanding blood or a fertility god wanting societal growth and prosperity, its definitely something I can add but probably later on.