ohh, So its basically addressing musicality rather than a specific this or that? So tonal palette would probably be like...how rich the whole structure feels? Appropriate dynamics, rubato, phrasing etc.? I don't know how to explain it. You know how when sometimes you listen and the notes are all there, but they feel as if they are just flying by because nothing feels shaped? or rather, the shapes chosen don't work quite well? [train of thought conclusion ]--->(I think) "Palette" implies tools, so tonal palette might be all the tools used to achieve a convincing sound. Correct?
You've got a pretty good basic conception of the thing. Of course it's different for everybody, and is a much much more complex problem!
Would you mind explaining please?
I think more along the lines of articulation and emphasizing the effect when something changes.