Well, the filtered saw is not in the same key as the other filtered saw hits. I think the bass is in F minor and the chords don't fit with the bass so it doesn't sound like it's right theory wise. Work on your mixing because there's no bottom to it. One more thing; Drum and Bass tends to be break heavy and fast pace. It seems that you're taking this at a cool 100 or more BPM which is more of a trance/techno kind of vibe.
Check out some of my tracks if you have the time, thanks!