That strain of feminism has always seemed sort of bad-tasty. It says "Hey, you know what we need to fight essentialism? More essentialism!" If someone were to pull that same kind of crystal-waving new age horseshit with matters of race or sexual orientation it would be way, way more squicky and hideous. As much as I roll my eyes at the "everything-is-a-social-construct-now-let's-name-drop-Foucault" side of things, at least that end of the spectrum would never use a term as utterly godawful as "Goddess Array."
I first heard of it when Katie Roiphe did a takedown of it on Slate. The book is apparently so bad it made Katie Roiphe actually look right about something for a moment.
I do love watching literati collectively, gleefully rip a book to shreds, though.