I had this entire spiel that must've gotten eaten by Uncle Mitch, but I'm referring to Legacy characters.
Characters that have had roughly 20 years or more of development into what they are now.
Power Girl and Catwoman only started getting refocused Post 2000. Before that, you either had the traditional Catwoman or the Jim Balent Catwoman. You can bring up Miller's Selina Kyle, but he only had the Year One arc with her.
Canary's development goes a little further outside of the 2000 comfort zone due to Simone's work on Birds of Prey. Hell, you can even see the roots of her work with Dixon's start.
Andreyko only had a short amount of time with the recent flip to Manhunter. Stargirl hasn't had a chance to become a legacy character yet. Hopefully, Johns will continue to push ahead with her. She stands as the best shot to further push female development in the DCU. Well, Natasha Irons does as well. But, she's never been a totally 100% forefront character.