My only complaint with this game so far is with regard to the sound.
A. The music is pretty generic. I wish this game had gotten a live orchestra like Uncharted. It was definitely a missed opportunity. It really changes how a game feels to have midi arranged music instead of a grand score. Heck, the music there, recorded with an orchestra, would have been amazing.
B. The way dialog fades in and out and is often waaaay too quiet, only to abruptly pop in with the annoying and extremely loud in comparison to the other dialog walkie talkie sound, is annoying. Sure they give you subtitles, but half the time I'm engaged in battle and can't read what they said. Other games localize the sound to where it should be coming from with regard to where they are standing in relation to you but don't let it fade out, and that works the best. I think it's admirable they went for realism, but realism should never be had at the expense of missing dialog and story elements.
Those are minor complaints. The game itself is easily an A in my book.