Well first of all, they did go back in the studio and add some vocals, for at least a couple of songs. From what I've heard, there's no Roger involvement though - David and Polly lyrics. Secondly, Ambient Monkeys, which I have heard, I agree was quite a disappointment and not particularly ambient. I remember the ambient sounds before the DB concerts and they definitely were more ambient noises than music. I'm guessing that the new album will focus more on musical bits and probably will be molded into some song structures too. Fingers are crossed. Low expectations, though, lead to pleasant surprises.