There's a lot of sound design elements that are pretty cool in that one ambient track, and that seems to be the focus of a lot of your arrangements. On that level you've got some cool shit. Some of the drums do sound pretty stock, but it's mostly the ride/hat/cymbal sounds. I think you have some original ideas, you just need to explore outside the genre you're in right now and find a more unique sound for your productions.
If you'd like some inspiration, I'd recommend checking out acts like Ancient Method, Balam Acab, oOoOO, Ital Tek... your sound design track already has a kind of grimy industrial sound that teeters on horror house, so you might as well try incorporating some contrasting kinds of sounds in there to mix it up and take that somewhere new. Even still, I don't see why you're not good enough to remix at your current skill level. Production is certainly fine, and in the end, oc remixes are more about the arrangement (as sometimes questionable productions are allowed through because the arrangement is really good). In fact, trying to remix something forces you to incorporate elements you normally wouldn't--namely, the source melody, and having building an arrangement around that.