It wasn't really something I thought about all too much until playing this run as the Indians in the end. 

Their unique building gives them a lot of religion per turn. But... you can't really do anything with it. 

I understand that it can be used to drive up war support for or against another nation, but what if they just choose to become secular to completely hard-counter that strategy? It makes long-term investment in the beginning of the game not having really much of a payout in the long run. 

Is there something I am missing? Or perhaps it's simply a system that is planned to be expanded upon?