The CTE added another music track that plays during the last counter-attack. This is what it sounds like:
It's absolutely beast, but as the video title says, it's way too quiet. I play Sandstorm at 40% volume and this video was while my PC was at 100%, and it's honestly still a tad quiet IMO. This particular track is also super quiet compared to other music tracks in-game. I think the volume should be increased to roughly 2.5x-3x what it currently is (this video is technically set so the track is 2.5x louder).
Also, having a separate sound slider that controls all in-game sounds except for music would be sweet, too, for anyone who wants the music to be louder but not the game sounds.