i think the intro is a little too long. but just my opinion. i wish you had added an extrra instrument with its own personality. like a piano or something just to add some variation. instrument selection is good. keep up the work
wel your using natural insturments, so try using other natural instruments like pianos and strings such as a violin or something. good work overall though.
I like the melody and the filtering ideas. The kick might have a bit more kick to it. Did you try some eq and compression? Maybe it's just the sample itself. PM and i can send you some really nice 808bass if you'd like.
Btw 'History' on your soundcloud is awesome.