It's generally agreed upon in the community that the religious victory is one of the more tedious to achieve. It's usually ascribed to the 'spammy' nature of religious units - they have finite uses of the spread religion action, so you constantly need to buy new units and micro them off on the map to spread your religion. The charge system makes the religious victory a kind of race of who can generate the most faith to 'out convert' each other, which seems thematically appropriate. However, it creates spammy micro intensive gameplay, that a lot of players find uninteresting. What if instead, religious units didn't come with a limited number of spreads, and instead worked more like traditional military units. Spreading relegion could still have a cost of faith for every time you use the ability if the concern is that one missionary could convert an empire with no other investment. Alternatively, allow religious units to 'recharge' their number of spreads by spending a chunk of faith/a kind of reinforce action/from a new religious unit.