I don't like the cut of the crossfader. Can I adjust it?

Yes.
Turn the [CURVE] knob on the front panel of the unit to adjust the crossfader curve.

For details, refer to the Instruction Manual > "Setting the crossfader".
For information on adjusting cut lag, refer to the Instruction Manual > "PC/Mac setup" > "Utilities modes".

You can read the Instruction Manual [here].

*Crossfader curve affects the way the sound changes when you slide the crossfader. You can adjust it to suit your preference when scratching or mixing. Cut lag is the length of the silent zone at both ends of the crossfader.