She won't understand, its either her way or now way at all. Reforming her is pretty much impossible, as her stance will be solid in what she believes. She was mostly a plot device though, much like Trixie was. She never said anything about coming back, so no, we won't see her again. She was humiliated pretty hard, even IF she did try and come back, i don't think it will be for a change of heart.
To reform a pony, you need them to understand your viewpoint, which i highly doubt Starlight will be interested in. The only thing she cares about is herself, nopony else, this is made clear after she admits it. Its actually a bad idea to repeat the same idea twice; i doubt they will go that direction again, that's just bad writing if they do.