Doesn't really sound like dubstep at all to me, except your drums, which sound like loops. There really is not much progression going on here, just the same stabs over and over. I would press skip on this.
Also, there isn't much of a drop at all. It just sounds like the same off key melody ported into the bass, which also sounds like a Mixcraft preset.
No offense, just isn't my thing. Definitely would send this one back to the drawing board, at least to fix the phrasing, so it doesn't feel like building up to another build up, to a nothing. Also, where are hats? Crashes?