This sounds alright, as long as earning the right to keep my empowerment basically means not breaking role, going OOC, etc.

There are so few Immortals, active or otherwise, that having to pick one AND go out of my way to be a "follower" just to keep empowerment would be too restrictive.

The vagueness and open-endedness of spheres in regards to religion is what makes the system we have now bearable in terms of variety.