I'd like to speculate that the next album with have at least vocals on a few tracks, I don't think it will be like anything that won't work though, I have faith. It took my a while to get my head round the guitar in Campfire headphase, but now I love every millisecond of that album as much as the others.
It would be a brave move, and not a sign that they are trying to go more commercial or anything scarey like that - after all BOC is just for special people like us right?
I have faith.