Cool tune, deff up on the sampling,.
If your looking for a lil change up,.. try throwing in another drum break and chopping up some edit's, sprinkling them in slowly like salt and pepper in a good pot o stew. or a few one shots will work, a coupla different snares and kiks, and maybe some distant cymbals at the major bar breaks. Ultimately I think its the same snare that catches me on the repetitive, even some pitch control would work here..
Also agree with Cheo, bring that last synth noise in after the first breakdown,.. but real subtle like
Solid tune tho, Im not sure it needs to much work but thats the advice I got for your question