In my very humble opinion, none of the scenes in War Horse are overscored. Sure, there's some pretty big music accompanying several scenes, but I never had the feeling of "this is too much". I found it absolutely in line with the film's aesthetic itself (good or bad, you be the judge). It's certainly music that harkens back to an older Hollywood scoring style, with lush themes played by a full symphony orchestra. And nowadays many people are just put off by such a stylistic choice and find it phoney or insincere. However Spielberg and Williams are champions of this kind of approach, especially in the movies that acknowledge very clearly a nostalgic, naive attachment to the good ol' days of Hollywood movies--like War Horse. What really impresses me is that many people are ready to point the finger at Williams for "overscoring" the films for which he writes the music and don't realize that A LOT of other Hollywood composers/directors are doing just the same, if not worse. Recently I saw Scorsese's Hugo and I noticed that Shore accompanies the film in most of the scenes with busy, melodic music. But nobody stood up and slapped the composer for putting "too many notes" in the film. That's not to beat on Shore (the music is really lovely and fitting), but it's strange that film critics and part of the audience seem to have become allergic only when it comes to Williams. And what to say about Zimmer's constant drumming and droning during The Dark Knight Rises? The music is playing for 90% of the film's duration, even accompanying dialogue scenes--and it's also really LOUD! But I didn't read a thing in film reviews lamenting that Zimmer "overscored" the movie.