Heathen! The only right and proper leader of the Birds of Prey is Oracle!
On a more serious note, I think it's a mistake to pile on too many characters onto teams. The Birds of Prey lost a bit of their allure the more members they added: three were probably the sweet spot for their regulars given their setup and style of stories. Five members looks like a good enough spot for general cases. But in general I think it's often better to think in terms of a small core (three to five) with recurring extras.
The lineup that Snyder created, with Wonder Woman, Supergirl, Vixen, and Poison Ivy looks like a good one to me, with good opportunities for each character to shine and good scope for team dynamics. Better not dilute that before it even has started.
«Speaking generally, it is because of the desire of the tragic poets for the marvellous that so varied and inconsistent an account of Medea has been given out» (Diodorus Siculus, The Library of History [4.56.1])
In that case, there's no point to it existing. I don't like Ivy's inclusion and I hate DC's inability to keep their female villains evil!
If there were to be an all female team, then I'd just pull the trigger on a "J-Force" team. Wonder Woman leading Hawkgirl, Black Canary, Zatanna, Vixen, Jessica Cruz, Katana and Mera. That's a fun, diverse team with distinct personalities. Doubt DC would ever do it though.
Done with DC. Can't handle the constant whiplash! Time to go on a hiatus!