Good observation. Yes I can see how that's unsettling, particularly when you hear the music out of context in this way. It is, as you point out, to allow the environment sounds to have an opportunity to be heard in between musical phrases. I wanted this music to breath in a calm and relaxed sort of way, and to interact with all the other sounds you're going to hear as well.
I kind of figured that would be the case as the mix does sound extremely dry (in terms of the mix, not the pitch content). Would probably sound much more fitting with the ambient sounds and reverberations behind it. The piece does lag a bit for me during the sections with only strings though as I guess after years of listening to classical, sampled orchestras stick out like a sore thumb to me. The melodies are great but I feel like it could really use a bit more attack and release to fill out the space. There are a few times when the strings just kind of pop-in that feel a bit unnatural. Again, haven't heard it with the actual game's ambiance and it might be altered before it makes it into the game so I could be way off. I definitely enjoyed the piece for the most part though.
If I could recommend something for your morning commute though: Austin Wintory's Banner Saga OST. The game itself was pretty great considering its Kickstarter budget but the soundtrack was beyond belief. The man has a real gift for restating themes and using soloists to their full potential. He's still fairly new in terms of big orchestral scores like this but right now I love him even more than I love Soule.
https://austinwintory.bandcamp.com/album/the-banner-saga