I really like the aesthetic here. I feel like you and I would agree on what we believe to be the most beautiful/interesting/thought-provoking moments in orchestral music. I find myself using a lot of these same chord movements when I write stuff, particularly when I'm going for a similar mood to this (more somber, reflective). Anyways, very nice job. I'm interested in the plugins/DAW you used too. The strings sound great.
HOWEVER, I don't think the piece would be compromised if you threw a big fat dominant chord somewhere in there ; ) perhaps to give a more clear direction and satisfying ending. It could possibly give a little more weight to the (flat VI's?) and other unexpected chords.