I wanted to wait until I had listened to the whole album a few times before saying anything, but I felt like I should respond to this first.
On one level, I have to agree that there seems to be some overuse of source tunes. But that's not really my complaint, because I think that it was pretty cool that a single project could use certain source tunes so many ways, in so many interpretations, and in so many different contexts. There may a couple of times when this doesn't work as well, but in general, I feel that it's a cool thing when a single mix can interweave different themes in it. And if you think about it, there are definitely lots of movie soundtracks that use the same melodies more than once, perhaps changing from major to minor, or at a different tempo, or for totally different scenes.
My real complaint, though, would be the omission of certain tunes. Of course I respect the decision to keep the scope of the cinematic interpretation down as movies always make these decisions out of necessity, but there were some memorable tunes I really miss (particularly the part where the trumpets come in during Magus's tune, the epic parts of the World Revolution theme, and many of the dungeon themes, like the sewer music). Overall though, I'm very much impressed. Great job, and thanks to all who made the project what it was.
-Mike
(full review to come later...might not be for a few days though)
[Edit] Well, I just noticed the part I was talking about in the Magus theme in Unknown's Parting of Ways, and the little oboe solo take on it works extremely well. Just goes to show I ought to stick to my word and wait until I stop using this thing as background music and really give it a serious listen before saying anything about it... [/Edit]