Here are my thoughts:
The Amazons - Absolutely keep! One of the best things Rucka did was ditch the horrendous New 52 Amazons and brought back classics like Philippus, Epione, and Io. I *hope* that future writers do bring in Mala, though. She's sorely missing for whatever reason.
Cheetah - Keep. The personal connection is what Cheetah needed most as a villain, but I do want to see her become more in control of her powers and maybe alternate between human form and cheetah form. I like her less as a victim and more as a powerful, confident woman who is in charge of herself despite the horrible circumstances.
Etta Candy - Change. Obviously I didn't hate Etta in Rucka's run, but I do want her to be more "woo woo!" fun.
Veronica Cale - Honestly, I just hope Cale is put to rest for the next few years. And Rucka didn't want anyone using the character after his first run, so it's possible he may ask subsequent writers now to not use her as well. Which would be for the best, I'm assuming her story will be completed after Rucka's final issue.
Doctor Poison - Change. I dig the new direction of Colonel Maru being a soldier, but I want to see some scientist aspects of the character brought forward. If she's a jack-of-all-trades (soldier and scientist), that'd be up my alley. And I'd like to see her Poison members fleshed out a bit.
Doctor Cyber - Keep. It irks me a little bit that Rucka felt the need to change her name from Cylvia to Adrianna, but whatever. She's fun, kooky, sarcastic... completely unique from WW villains that came before her. I do hope she branches off on her own as a villain.
Deimos & Phobos - Keep. I love them as pompous pretty boys.
Urzkartaga - I feel like his story is done, so it's a non-issue. I don't want to see Cheetah be a slave to him anymore.
The Patrons - Change. It would be nice to see them back in their outlandish designs from Azzarello's run.
Circe - A mixture of both. I liked her way more in my second read through of #20, but I do think she needs a few tweaks.
Ares - No idea, since we haven't really seen him yet. If he's that naked guy in the tree from a few issues prior, then I'm okay with it.