Cinematic Halo music is going to take some time to get used to.
Not that I don't like this stuff (it's texturally sound and nicely orchestrated), but for me I miss the attitude (disclaimer: by attitude I just mean that sense of organicism, unknown, the feeling of being small in this huge universe; it just seems absent in this and not personal enough anymore like that initial journey was) of what Halo music meant. Don't take this statement as, "I want Marty" because that's not what this statement means at all. I'm just speaking from a composition level that it's a bit too incidental for my tastes and preference for a Halo soundworld. (READ: I'm not saying it's bad composition at all)
I applaud Davidge for going boldly into a completely different direction and for doing so confidently, (and they're good works what we've heard), but for me it doesn't embody that same attitude that i've come to expect from Halo games. There's lots of ways to maintain attitude but to completely bring your own style to the table compositionally, but here I feel there's just a straight up disjunct as of now. I have a feeling though (based on the viddocs) that the cinematic music is more in line with the cinematic atmosphere described in the March 5th viddoc.
I'll wait to hear more though, for sure. Also, OST thread will be fun this year.