To me, the only truly standout piece composed for the Reclaimer saga was "117," which I actually do think is a pretty great track.
Given what they've released of the Infinite soundtrack, I think it's safe to assume that they're going for the traditional OT motifs. It sounds like they're taking Marty's old approach by iterating and adding to the great foundations gradually in each new title. Regarding "Rock Anthem," and "MJOLNIR Mix," from H2, I'm no different than most fans and love the hyped-up guitar. Personally, though, I think things got really good in Halo 3, when the piano overlay kicked in on top of the classic themes. To me, the piano was a more mature and self-assured touch than the (still phenomenal) guitar. It maintained a sense of novelty since it was placed so heavily in the orchestral mix, but it wasn't quite as irreverent as the guitar had been (again, which of these you prefer is certainly a matter of personal taste, I just err on the side of the piano myself).
In any case, I'll be thrilled to hear some throwback guitar riffing and/or piano that bring to mind the OT soundtracks.