I wonder if amidst all the technicalities, politics and maneuvering, the simple question of whether or not this is going to help promote the Dhamma among women, has been addressed (by the "opposition")?
Clearly the Sangha are the torch-bearers of the Dhamma, the guardians of the spirit and the letter. Having a (largely) male Theravada Sangha limits the appeal of the Dhamma in the modern world, both for women and men, I think.
And I feel that having fully ordained Theravada bhikkhunis will help address this imbalance and inspire thousands of women across the world.
I remember when we had Ajahn Thanasanti come and talk. What an amazing talk directly from experience, and what an inspirational woman! Many of us were moved deeply and I am certain a seed was planted in many of us in the audience.
I hope the new bhikkhunis are inspired by this ordination and further inspire thousands!