I feel your pain bro, im trying to do dubstep as well and is by far really a hard genre for me (of course im a noob at this, and with out any real knowledge of FL is harder XD)
still as you say i dont feel any wub wub or any kicking noises to give me a "dubstep feeling" its more like a Trance-ish song its still good but i felt more like the "base line" you could use it and add the wub wub(s) later to really make a Dubstep Song.
It was hard to rate and i think it deserves a 3/5
-Add some wub wubs and growling sounds and this will become a 5/5.
but hey... thats my Humble opinion ;)