I'm also waiting and very interested. I just had this idea that since RS1 is called Ivory and RS2 is supposed to be called Ebony, I hope RS2 will be darker, more serious, and possibly heavier, which would most likely solve my main and only real problem with RS1.
Daniel has said the two albums will still sound like songs that belong together as a whole. They are just reworking parts of it, not changing most of the songs or the album's general sound.
Also, you don't have to like it, but I can't help but feel most people here are missing the point of Enter Rain. No one ever said it was the most creative thing that Daniel has ever written, or the most "epic"; it's the simplicity of the song and the buildup that makes it so great to me, even if it was probably the easiest PoS song to write, I find it one of the very most effective. The Perfect Element was complex and metaphoric, but Scarsick was direct and simple (and in my opinion, effective), take it or leave it.