Personally, what is the point of having a legacy name if you can change it is a title that is earned to distinguish your characters and is part of the theme Star Wars has, I’m not saying as a role player, (never tried that myself) but as someone who takes pride in having a defined surname, hence, still trying to decide on a decent name. In addition, I understand that some people have made name that they consider hideous, short answer, should have waited and though it out properly.
P.S. Name changes should not be allowed.