Line up the timing better, it can be cleaner. And it sounds like you did a quantization that doesn't align itself exactly and speeds some sections which can be effective, but it ha to land and pick up on the beat otherwise it feels unbalanced and chaotic. All that said, how the hell can you go wrong with Sampha - especially this section of the track, it's brought tears to my eyes before. So I like this, despite the timing issues
I can't comment on mix quality but timing is some parts seem to be a little off. Other that I liked what you did with the track and I can see where you were trying to go. Hot track. Makes me want to listen to Sampha's album all over again