I agree with TheDukeofJuke when he says the song isn't up to a DnB tempo, but in contrary, I do like the piano. The overall song is nice and relaxing (not what DnB is supposed to do to you)
Suggestions...
1. Grab some gritty bass and throw it in there... just make sure it blends well with piano.
2. Crank the speed/tempo up to at least 155bpm.. then you can at least call this ambient DnB.
3. Guitar is really muted... bring it's levels up a bit.