Seems very flat to me. First off, the majority of the thing sounds like bass solo with snare and tenor accompaniment. That trick only works for so long, then it starts to get old, just like any other trick. There's a section towards the end that grooves pretty hard, however there's nothing to really set it off from anything else, it just sort of comes, grooves a little, and then fades away. What this is really lacking is contrast. Dynamic contrast, as well as contrast between which section is featured, including some "tutti" stuff. There's some good ideas in there, just keep playing with it. I know there's another thread where I made very similar comments about a cadence... maybe it was one of yours?