I, too, would've loved to have seen Elizabeth Eis at the earlier convention.  Buffy has always also been one of my favorite minor characters.  The one thing I loved about her is that she was the only character on Dark Shadows who had a television set in her home, making her seem one of the most "normal" and "regular" people to populate Collinsport.  Not even the Collinses, whether in NT or PT had a boob tube anywhere in site.
Gerard