This is all pretty tight. If you're looking for another element, I'd suggest just a hint of grand piano with reverb on the part between 1:46 - 2:06. Just as more of a sound effect and texture. a not or two could do it.
If I hear anything missing, it's that the part from 1:46 - 2:26 needs another minimal element that gives it a bit more lift. And I think a piano note or two with a nice lush verb could do it.
My 2¢. Cheers...