The only thing I wonder is why some parts sound muffled. I listen to Howard Shore and John Williams(among many others) daily and they sound fine so I know it's not my speakers.
It's possible that they have to compress it more than they'd like to so that it downloads fast while playing, to accommodate users with slow connections. Most people wouldn't notice, sounds good.
That's probably it, Mike. Sound is one of those things that the majority won't notice minor things on, but people who work with sound will. We'll see when they release the new audio in game.