I don't know--I wouldn't necessarily call the finale faith-based. Couldn't someone non-religious or non-spiritual believe in some form of afterlife? While it was certainly a lovey-dovey ending, I don't think there was too much religiousness to it (aside from the fact that it occurred in a church). Christian didn't say something like "God is waiting!" or anything.
Don't get me wrong, I hated the finale, but I didn't hate it because of any religious overtone it may have had. Really, doesn't any story about good versus evil (something we sort of had here, I guess) bear some amount of spiritual/moral overtone?
But these issues are a bit out of my area of expertise (if I can even claim to have one), so if I sound like a bumbling oaf, feel free to ignore me.