You don't need to wait. You can read now. There are already plenty of books by diffent types of women and feminist. Some use sociology, others not.

Sociology is just one approach. And having different approach to a subject is not bad. Wasn't epistemology a brach of philosophy?

Well, feminism is transversal. It has plenty of approaches. And google is your friend, I'm sure that if you search for "women philosophers" or "feminist philosophers" you'll have plenty of ideas an information. There you go, an starting point.