I think it would make sense for Back + Pad when in pitch multimode to set the 8 pads to the notes of the defined scale, if one is defined. Currently it ignores the scale and sets the pads back to C major. Ideally, set the first pad as the root note, then 2 - 7 are just the next 7 notes in the defined scale.
As added functionality, it would be awesome to be able to shift the pads up and down the scale using some key combo using the left and right keys.