This is really beautiful! Check you out with all those awesome libraries! I love the soundscape you've created in this song and of course your choice of plugins and libraries is nice.
They're designed to be some of the most realistic on the market, but I think your track could definitely benefit with some more techniques to make the digital composition as instrumentally realistic as possible. One particular part that stands out for me is the string part at 0:45 (viola/violin?) - the individual notes all sound exactly the same volume and strength. Varying the dynamics of the individual notes, even slightly, will make it sound much more like a natural performance. If you imagine a string player bowing the notes, as the arm moves from right to left along the string, the force they use for a part might be very similar but never exactly the same for each note. The same with pressing the keys of a piano.
Other than that, the track is really interesting and very sweet. I love the vox! Keep making lovely music.
Followed!