A few things.
First of all this should be in the dubstep section no dnb in the whole song at all. But i am not giving you a 7 because of that though!
The reason is that the piano and the snare sounds too midi'ish if you get my grip. They don't sound too realistic.
Also when the song is in further stage like around 00:52 the drums don't add much as the melody is louder than the drums.
And around 02:50 it's kind of the same thing drums are being overpowered by the melody.
But keep improving!