Traditional Orissa Project:
This video will start at 5 minutes (you can watch all if you wish)- shows how the tradition was feminist, [as well as anti-caste, and anti-racism] since before the 1500s.
Deeper Reading on the Utkal Vaisnava History
The whole book is interesting, and specifically discusses Panchasakha in the last section .
The entire preface is great, but pages cxxxvi onwards directly address the Panchasakha .
Translation of parts of the Odisha Bhagavat Purana (Bhagabata) which was one of the first times a Sacred Brahmana Sanskrit text was translated into the common language to inspire the common people. This was revolutionary in India and started a cultural revolution in Odisha.
Article to understand Theology associated with the tradition more deeply:
Caitanya Vaisnava Theology in Context
Buddhism in Orissa