AS said many times before, the positioning was just bad. Actually, funny thing, they filmed that scene twice, one shot where Andrew dies and the other where Anya dies. I'm sorry but I wouldn't be able to handle seeing Andrew be sliced in half. But her death was just that a death, Joss said himself, that he needed someone to just die unherorically, which sucks, but a character such as Anya as well as the actress who plays her deserves more than that as a death scene.