Really interesting to think of this piece as dnb filtered through pop and classical. To better suit the classical instruments, I would approach your panning of the drumset closer to that of an actual live performance. The hihat should be a bit to the left or the right -- your pick, and whichever sounds better.
The clean guitar at 1:38 does not fit the instrumentation at all, and seems written as if for piano rather than guitar. I would swap it out for some more obvious acoustic or poppy instruments, or split it into 2 different parts panned left and right.
Strings sound freaking baller though.
Watch for clipping (crackling) also. This can happen when you don't mix in 32 bit floating point.