I like the fusion of cinematic and electronic elements. The cinematic elements give the song a more epic and serious sound than what is typical of dubstep. The dubstep parts have interesting sound design and effects.
I think there are a few problems with the mix. There's a lot of mud everywhere, from the instruments themselves to the reverb, and many instruments are masking each other. When arranging the different lines, it's important to be mindful of where each instrument fits in the frequency spectrum. If you find yourself trying to make things fit with surgical EQ, maybe consider if there's too much going on within a certain range. The reverbs you're using don't seem to be of high quality. I suggest using EQs with reverb to lessen its affect on the lows and highs, to taste.
At times some of the sidechained percussion like the claps overpower everything else. It's better to make space for it in the arrangement than to overuse sidechain compression.
The acoustic percussion sounds weak and seems to be missing some low end. Epic music composers typically layer multiple drums with different sound signatures to get more impact across the spectrum.
I noticed your orchestral instruments are very close to the listener. I think it makes sense for the aggressive cello staccato, but for everything else, I think you can get a more epic, gargantuan sound from using more room mics, and it can nicely contrast the in-your-face electronic elements.
I hope this helps! Take all this with a grain of salt because I don't make electronic music.