This is not a typical dubstep song. It's great that you tried to make it sound more original than most dubstep. I'd really like to hear more music like this from you. When making a dubstep song, I advise you to avoid the general structure, which is:
Intro , Build-up, Drop, Dubstep, Post-Dubstep, Build-up, Drop, Dubstep, Post -Dubstep, Outro
But still, I think you need to work on the dynamics.