Careful what you wish for. Hoods on all robes would either mean huge models that avoid clipping but look silly, or small models that clip like crazy. The other option would be to limit the size of the head models, which means everyone would have the same hair style.
As for choice of hilts, it could be done, but not using the same system that they use now. You would have to choose your saber during character creation (much like Jedi Academy) and you probably wouldn't be able to change color crystals.