Hmmm...

I feel like you are going for a liquid dnb kind of vibe but you are not getting there completely. I do see potential in this song for that kind of vibe. I do think the drums are not "smooth" enough for that though, and I think it lacks some kind of pad too to really establish that vibe too. More in the background at least (or if you have things in the background they need to be turned up more).

Smooth too me means a little less syncopated and hitting more 8 notes. Your fills should probably be restricted more to 16th lifts to get the vibe I am thinking about.

Also, process those strings more. Make them your own. Right now I cant tell if you did anything or if you just added a sample on top of your drums