Agree. Can't see why one of the religious civics isn't a full secular option. Again, would be nice to turn off religion completely.
I translate free religion as "seperation of church and state", which means secular. The way religion is modelled you can't really influence your people's religious beliefs once the believers are out there, which is how it should be.
No government has ever successfully eradicated a religious belief, so why should it be possible? Maybe there should be an option to oppress a certain religion, which would imply you lose the religious benefits, get hated by leaders with that state religion and gain .... errrrr.....
I guess in history religious oppression has almost always had the habit to bite you in the ass eventually, so no idea.