I think JonJon brings up a good point: song structure really makes or break an awesome DnB track. My style demands motific subtle development, but DnB is somewhat an ever evolving track that changes color in your face with power and style! Having designation sections to introduce new ideas smoothly is great to have in your arsenal!
Not too sure how much critique i can give but I think the trebley synths sound too alike; as u get better at making synths (which took a lot of time for me and does for us all) I think the melodies will stand out more and it will be more crisp, also needs more bass &kick!