This piece is great. Everything from atmosphere to intrumentation, melodies and mixing is amazing. I love the chill mood, mostly created by the soft intruments and the pads in the background. The percussion is good too, and pretty interesting.
My favorite part starts at 2:11. You can hear that there's a lot more reverb here, and the change is pretty noticable as there are more and so different intruments. Still, the transition works pretty well. I think I can hear some of the mixing issues you mentioned here and there in this segment of the piece, but I'd say they aren't that bad.
The transition back to the former format at around 3:30 is flawless.
All in all, awesome job with this composition ;)
thanks for the kind words, they mean a lot to me. once i get a new pair of headphones i'll see if I can't fix those mixing problems.