Joan, Joan, Joan, it's all about Joan.
Joan of Arcadia? What a strange name. Obviously a reference to Joan of Arc for those crazy catholics out there, I being one. That's one strike against the show, surely it has a Catholic bias. Oh, and it's another teen/family drama; that's gotta ge at least two. Three strikes, you're outta here!
I recently picked up the first season bc let's be honest, I found it for $20 and was in a definate need of a pick-up. I've since watched the entire collection, and I've been a little skeptical.
First off, don't expect fast pacing, until what was possibly going to be season 3. Season one is especially slow pacing, but I think that's what it was designed to be. It's like writing the prelude to a deep genre, it's going to be slow if you take the time to explain instead of jumping right in like Lost.
Unlike Touched by an Angel I didn't feel overwhelmed by the Christian myths and smothering morality. Things are reactive, only happening when they're expected to.
Don't go in expecting explosions and great miracles of God, but instead look for the ripples, and you might find a fairly decent show.