First thing that immediately caught my attention was the filtering of the first harmony. Starting out as a fat muddy sound then having it become more refined after you introduce so hifreq sounds like hats but introducing low frequencies to keep it full. Was nice. The reverb on the snare is pretty wicked and I like the use of cello sweeps, sounds like a cello noise to me, that are panned away from the focus.
A definite 5/5 on atmosphere and creating depth.
I think if you had a longer phase sequence or some more interesting filtering on the gating effect later in the song it would sound a lot more dynamic.
Also for the ending I think if you let it draw out longer instead of immediately cutting off you could have a lot more of an eerie lingering feeling that feels more resolved since there was so much noise splashed everywhere. Probably just let the low resonating note just play itself out.