Well, the score is exactly what I expected from Balfe, a bland remix of The Dark Knight Rises and Inception, with his synth textures from Ghost in the Shell thrown in. There's lots of synth droning along with cheap, fake sounding strings. This is yet another score of his that is mainly an imitation of something else, with no unique style of its own. I wonder if Balfe even has his own stylistic voice, or if imitating others is his style.
Thankfully it's not completely awful, so it should work fine in the film, but it's such a massive step down from what Kraemer did on Rogue Nation. I just can't imagine what went through McQuarrie's head in thinking Balfe was a better option.