It really shows unfortunately. It sounds very noticeably unauthentic. Most of the charm of 'downmixes' is seeing how the artist copes with the limitations. You need to examine what the most prominent aspects of the song are, and make sure they get the priority, while creatively covering the loss of detail from the remainder.
Easier said than done. Still toying with it, but this was a product of the only known Tragic Prince MIDI (because D9's a lazy hack who can't scratch-compose existing songs worth shit), which is an absolute trainwreck. The main melody (guitars) alone are split into about six or seven separate channels, because whoever wrote the original midi apparently didn't feel like putting all the pitchbends on one channel. And the MIDI's overrun with random notes that are there for no reason. Getting it THIS far has been nothing short of miraculous.
I don't usually have too many problems with making downmixes/style changes sound authentic, but this one's a pretty glaring exception. It's fighting back something fierce.
But duly noted. I'll keep on it.