ooohh very nice. There's an easy way to do classical samples wrong, and this is the opposite. You really wrung some beautiful moodiness out that piano. The vocals add a real sense of space and didn't feel at all overused or out of place.
The bass is the only thing for me. Not that steady regular one with the kick (even though it should have been on a different note on some of the beats imho) which was beautiful, crisp and warm. The stringsynth bass added a lot of atmosphere but it got muddy quite a bit. Have you thought about putting hi & low cut filters on these type of parts? I think that technique might help you get cleaner mixes while keeping the broodiness these dope synths add to the mix.
All in all, very nice. I really like your sound actually. It's pretty minimal, but it's often just experimental or different enough to be unique but cohesive. Good looks mane