I know TioJorge was in on the first season, but he hasn't posted in the thread in a long time. It's a shame too, because I think the show deserves so much more. Don't get me wrong, I understand why people flock to shows like Game of Thrones and Walking Dead, but this one has just been so much more satisfying for me. Don't know what exactly it is about Leftovers, because it's not really the mysterious aspects or even necessarily the plot, but it's never let me down. I guess it's just asking the right kinds of questions of me, at this point in my life, if that makes any sense whatsoever.
As for Season 3, if it makes it, I think you're right that it could go anywhere. I don't see them up and moving in the same way that it did between One and Two, because the believability of that shift in setting was entirely predicated on the uniqueness of Jarden, but there's definitely a lot left to explore. I think the situation in Australia is probably the most obvious direction for things to head, but again there's no telling how that will relate to the current cast of characters.