wow i dig the modulation.
the percussion is drowned out though, bring it up and lower the modulation a bit. you can barely hear it lol.
the pattern also gets very repetitive.
i don't really care for dubstep/i know for sure this wasn't dubstep.
This song has no beat! what!
Man you gotta work on your progression skills as well as bringing in new synths.
Make your kicks as loud as your bass, because bass isn't the only instrument in your song :D
Dubstep focuses on the Kicks, Snares, Hats, and Heavy wobbly bass. Making these weave in and out is key.