X-fader adaptation

Continuing the discussion from [Gig] X-fader - crossfade two volume parameters:

Thanks for your contribution @David-san…really appreciate it…my question is…when you need a very simple cross fade and you want to minimise UI ie just a single knob, as you know it so well…is it best practice to mod the script and directly access the volumes of the mixer (if that is simpler and also possible) and assign those in the plugin or is it better to hide the 2 faders on the ui?
Cheers