Below my thoughts on your beat, i.e. what I personally would check for it:
Snare - I would either make it louder or bigger (check layering with other sound)
Quicker hi-hat pattern (I think a more newschool one can fit here nicely)
0:24 - brass sound - sound a little bit raw like from VST, I would check here Kontakt libraries or Splice samples
0:51 - melody - cool idea, but better if played from MIDI keyboard (this would definitely add more swing)
Same sample pattern all over - I would create a new one for chorus or add some automated section with low pass filtering.
One question regards Outro (from 2:34) - it's really dope! How you did that actually - is that just one VST or does it require more work?