I found it easier to map a secondary controller to Soundswitch, something like the Numark Orbit or Akai APC 40 MKII (if you need faders) things can get really brain melting if I map the same main DJ controller.
You don’t need Stagelinq to use Soundswitch.
Not sure what plans Denon has for that Stagelinq port on the MCX8000.
Soundswitch works with Virtual DJ on the laptop.
Congrats 