Totally agree, over here!
I think some of WW's rogues and supporting characters - the rogues, especially - can be a harder fit for writers to use in the DCU mainstream (Green Lantern, Flash, Superman, etc), ..primarily because of their fantasy genre magic. [It's that blamed magic! Arg!] There are others, like the ones you named, which writers might more easily work into mainstream stories, ..and I would love to see DC's editors work together - sift through the Wonder-rogues and pull out Janus, Cyber, Clea, Adjudicator, Giganta, Atomia, bla'bla - to make that happen. It really can happen, with select Wonder-villains as they are - no re-imagining or tweaking - with a concerted effort and some visionary editors.
That's the development, I'm always crowing about. Development, development, development!
Hey! I want to see that Doctor Cyber/Lex Luthor/Riddler three-four issue, high-stakes nailbiter, as much as you do! We should have had a CRATE of those, by now...2023, ..and it's sad that we don't.