Would it be possible for priests to change some of the visual effects within a Shrine once it has been purchased? For instance, instead of the Crystal and Pool lights of green and blue respectfully, could they be changed to the other colors via a menu? If so; that would really help the ambience of a Shrine feel more customized to a specific deity. Because I know a lot of deities have associated colors: (Bane - red/ black, Beshaba - purple, Loviator - red, Illmater white, etc...)
I think this would take a lot of work, but it would be cool indeed.