While this doesn't really excuse the storytelling flaws (which are still leaps and bounds ahead of anything CV has done before) I think people need to realize this game didn't have a big budget, nor was it made by a big studio. I know it's tough to believe, looking at the graphics and whatnot, but Lords of Shadow was Konami taking a big risk with a small studio.
It kind of explains the lack of variety of music, probably my only complaint with the music. If you're a small studio with a moderate sized budget, and you're dishing out the bucks for Patrick Stewart, Jason Isaacs, AND trying to get Oscar Araujo to compose with a full blown orchestra, you're going to have to work your money well. I mean, seeing what my band teacher used to charge to compose and perform music, I can only imagine how much an orchestra costs.
Which is why I'm not to worried about the soundtrack of the next game. They'll most likely have a bigger budget looking at the success of the game, which in turn will give Araujo more songs to compose, some feedback from the first game, and probably some more compositional freedom.