While I can't disagree with the general tone of your review (and also can't agree with it, having neither heard the music nor seen the film!), I'm not sure what point you're trying to make here: "Over the thirty years prior to The Vampire's Assistant, the scores for vampire films have gone from the realm of John Williams, Wojciech Kilar, George Fenton, and Elliot Goldenthal to that of Richard Gibbs, Jonathan Davis, Carter Burwell, and Stephen Trask. As a result, the music for these films continues to scratch tediously at the walls."
Are you seriously going to compare the scores from big pictures by prominent filmmakers (and one incredibly obscure film scored by Fenton which never even had a score release) to a string of commercial teeny vampire flicks? Are trying to say that Burwell's not one of the most consistently interesting and unique composers scoring right now, despite a forgettable effort for a terrible movie?
You could jut as easily have said, "Over the thirty years prior to The Vampire's Assistant, the score for vampire films have gone from the realm of Brad Fiedel, Brian May, Chuck Cirino, Leo Delibes and Richard Stone to that of Johan Söderqvist, Marco Beltrami, Alan Silvestri, James Newton Howard and Christopher Gordon."
So while I don't disagree that there are bad vampire movies with forgettable scores now, the same holds true for the tons of bad vampire movies with forgotten scores from previous decades, and there are also still vampire movies being made with good scores from good composers.