The parts are by-and-large in tune, save for the odd note or two, and I suggest you work on those notes. The harmonies are beautiful.
The vocal parts making the aah chords sound really nice, but they're overpowering the melody. Key to every song: THE MELODY MUST STAND OUT. Because the melody's frequency is higher, separate that higher frequency so that everything in the song can be heard.
As in the previous review I gave you: clean vocals would be appreciated for this. This sounds more like jazz rather than Ethereal Wave -- if it were Ethereal Wave, you'd have a licence to have more reverb on the voices because that's what gives the song its ephemereal quality. NOT in this case, however. Remember: in an acapella track, every voice is a separate instrument, so mix it as such.
Please contact me if you would like to use this in a project. We can discuss the details.