You are definitely right Akratus. Sound effects (and music) are just as important as the visuals for telling a story, especially when it comes to SW. Who hasn't mimicked a lightsaber? I'm confident Ady will be keeping what he can that sounded great originally, but then enhance/replace anything outdated/terrible sounding.
So basically, ESB:R will sound just as good as it will look, which will be all-around awesome XD
And I agree with you, muddy, I also liked the unique sound of the PT Slave I for the exact same reason. Hopefully we'll hear it in ESB.