very refreshing to play a feedback dub and not just immediately want to slap the money shot thread in their face
tight mixdown. i'm not good enough to be able to advise you any more on that.
i think the only thing i can comment on is the bass design, the 2 things that came to mind were that the growl isn't very unique, (sounds like the WOW filter i think?), so work at your synths to develop your own sound, and your pitch envelope bass needs layering with another sound to keep the spectrum fat.
good job though, impressed with the mixdown!