I don't understand how that could be the issue, it's just a WMA file playing, isn't it? a few weeks ago there were impressions done by a Canadian journalist at some Toronto Xbox event and he was told that all cutscenes were final
listen to the air in this, it's shorter than it was before, apparently they've really chosen to re-edit some of Uematsu's tunes
I actually liked the boss fight music in Sakaguchi's demo though, it was originally revealed in the first 2005 teaser trailer for the game... it makes me think of Lodoss War