I don't much remember the music from Human Revolution, and I quite liked Human Revolution... then again, I also liked Invisible War, for context.
Human Revolution originally had a yellow tint to everything and it was weird, fortunately the directors cut let you disable that "feature". So I can't say their direction was always correct.
I do remember the music from the first one. It was almost as iconic as the game itself. But I have to agree it would not be a good fit for Human Revolution. The composer would have had to turn in work that did not sound like it belonged on the first game's soundtrack, which is probably possible? Going with a whole other composer sounds petty, unless that composer only has one style or sound.