I honestly can't think of anything that brushed does better. The are less consistent;even after a comm. cut and new brushes the motor still might be down on power, constantly need maintenence, less ultimate power (wattage), much less low end torque, less run times and more heat (at the motor)
Only possible thing I could see brush having an advantage is in 2wd even with 8.5 and 10.5 motors they are a little torquey on the bottom which makes it a little tougher to find traction. Most brush motors have a milder bottom end. You can tune most of this out however on the radio or the esc.