Here's another one...
Now that we know Palpatine's facial deformation isn't attributed to "dark side use," I think the LS/DS appearance shift should be tweaked. It's ok for a character's appearance to become more sinister if they are DS, but not to the point they look like a geriatric. Hair doesn't have to turn white, skin doesn't need to become pale and withered/wrinkled, and eyes shouldn't glow all the time. <_<
Anakin, post fall to the DS, is an example of what I'd like to see. In Episode III, you can tell they added dark makeup under his eyes and make his skin a bit more pale, but it wasn't as if he aged thirty years and/or bleached his skin.