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

Yes.
To set a steeply rising crossfader curve, press the [FX3/CUT3] button while pressing the [SHIFT] button.
To set the default crossfader curve set in the Utility settings, press the [FX2/CUT2] button while pressing the [SHIFT] button.
To change the settings in the Utility settings, see [CROSSFADER CURVE] in [Settings] and [Utility settings] in the Instruction Manual.

For information on adjusting cut lag, refer to the Instruction Manual > [PC/Mac setup] > [Set the range where sound won’t be output at both sides of the crossfader.].

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.