Just do it! That breakbeat section was great combined with that instrumentation, it just didn’t fit to the “main style of beat” of your song. IMO. 
You definitely improved a lot. The mix is easy twice as good as before. Vocals and sound are almost equally loud now, time to make the vocals audible, too. If you want to improve the mix you need to finish the instrumental mix first, afterwards add the vocals. So first of all you need to get rid of the mud in the sound and to gain some bass as well as more punch. I would recommend to start with the kick, make sure it has some bass and puch (regardless if it’s supposed to dominate in the end or not). Add the bass, adjust the volume and make sure there’s no distortion (sidechaining also helps). Add the snare and adjust the volume, add the rest of the drums and adjust the volume, add an instrument and adjust the volume and so on. Check the mixing thread for mixing hints. But the least you need to do in terms of filtering and loudness is the following:
Activate auto gain and maximize the volume.
Put (at least) these (native) devices in your master track (right click to open a bigger version)
While mixing you can switch between mono and stereo by turning on/off the stereo expander (mono).
Put this in every track except kick and bass
These values are the average minimum requirements, of course you’d get better results if you check every track individually. But you need to get rid of those low ends (which prevents mud and gains loudness).