Wow! Bravo,.
1.I personally can't do dubstep, I fail every time (need to work on it), so it does that I admire people who are able to make dubstep, you success.
2. When you place a voice in the music that's raising the level of the song, and here the Vocal is really good, but is too weak and deep in the song, the melody rises above the vocal Which is making it flat, it's a problem.

Good Luck!