I liked Granny Weatherwax in the Wyrd Sisters and the Carpe Jugulum, but in the Equal Rites she is mostly a stereotypically boring and underdeveloped. (Yet?)
So-o-o-o... The ending of the Equal Rites is underwhelming and went nowhere. Also later parts of the book are heavy with undiegetic pop-references. And it kinda contradicts first two in how magic works.