The only thing that bugs me about the color palettes is that the “Show Box” box is always white, even when chosing the “White Background” scheme. I can’t find an option to manually change that color either.
It’s not a big deal, because I would just switch to another scheme for editing, then switch the scheme back to “White Background” before saving the state for the generation of renderings, but maybe it’s something you’d want to consider for fixing while you’re at it…