I like Cale, I do. I think she is a great addition to Diana's rogues gallery.
She's not Lex Luthor. Sorry, but she just isn't. They haven't done enough with Cale for her to be as interesting as Lex. Yes, she likely dealt with sexism her entire way up the ladder but that doesn't automatically trump all the qualities that made Luthor a compelling character for eight decades. Certainly not when you consider he's one of the most well-known villains in fiction, opposite to THE superhero who by all rights should have no problems with him and yet amongst Brainiac, Zod, Parasite and many others, Luthor is Superman's most dangerous foe.
Veronica Cale isn't even in the conversation for Diana's, and I wouldn't say that Diana's rogues are significantly more dangerous than Clark's. If we're being fair, they're probably equal even if DC pretends she doesn't have one.