I think I would miss all the dedicated sliders on the PA3X. They have multiple functions, selectable a row at a time via a button.
Default is overall style volumes and lead volumes, such as Drums, Bass, style volume,Pads, RH1, RH2, Rh3 and LH. Second row is all individual style part volumes. Third row are the organ stops. The next two rows are all totally assignable for just about any keyboard function. Setups can be memorized in Performances and/or Songbook entries.
You can get screen view to see what adjustments you are making, or just trust your ears on the fly.
It's one of my favorite features on the 3X.
DonM