Rucka admitted so himself that he views Cheetah as Diana's "Two-face".
-
Anyway, I don't know why Diana's relationship with her arch-enemies, whether it be Cheetah, Circe, Veronica Cale, or Devastation, has to be the same as Batman's relationship with Joker or Superman with Lex.
And if we are going all in here, Marston himself never really intended for Diana to have an arch-enemy, not in the way arch-nemesis would eventually turn into anyway. But, it was clear from conception Cheetah was a favorite of his and H.G. Peter, since she shows up a lot in Wonder Woman comics and in several of Peter's unpublished stories, so it was clear they where trying to make her work whenever possible. And honestly, I wouldn't be surprised if it was Marston's endgame to have Cheetah reform Von Gunther style, but done better since that reformation was kinda messy and Pricilla was more sympathetic from the get-go.
And Rebirth Barbara has a leg up on Pricilla in the sense that, she doesn't want to get better. Rucka ended her arc with Barbara being perfectly resigned to being a killer.
-
And I guess to add to this thread, a long occurring problem with Cheetah is that many WW comic writers didn't or don't view Cheetah as Diana's arch. It's clear Perez didn't, Messner-Loebs didn't, Luke didn't, Jimenez didn't and even Rucka didn't. In fact, even Circe wasn't viewed as Diana's arch nemesis by many despite Perez spelling it out on the page.
Luke didn't think of Circe like that at all, stating in an podcast "Wonder Woman never had an arch nemesis like Superman/Lex or Batman/Joker." So he made Devastation, who faded into obscurity the moment Jimenez picked up the book. And Rucka, whom I'm sure was aware what Perez was trying to due with Circe, didn't, in either of his runs, write her as an arch-nemesis type character. So he created Cale, who he did much better the second time but was every bit the victim that Barbara was.
(I think Simone was the only writer to see Cheetah as Diana's arch during post-crisis.
)
So if you want to know why there aren't really any stories dedicated to Cheetah the same way
The Killing Joke is to Joker, or
Lex Luthor: Man of Steel is to Lex, it's because, until recently, not many writers weren't really in Cheetah's corner in that regard. (And it's not like both Joker and Lex started out as the "polar opposite" or arch-enemies of Batman and Superman, other writers made them that way after the fact.)
But despite that, the reason no other character has come close to knocking Cheetah out of the top spot
(except for Max Lord of all people as someone hilariously/tragically put it earlier in this thread) is because of Super-Friends, where she is undoubtedly Wonder Woman's arch-enemy, and the overwhelming amount of times she has appeared in other media outside of comics.