Selina should really be drawn as a traditional femme fatale type more often - it's a good look for her. Really, it goes back to her classic Golden Age outfit, which was basically a slinky dress with a mask and a cape. I've always somewhat preferred that look - sure, it doesn't work if she's going to be a literal catburglar, but as the 'master criminal' type that she used to be, it suits her admirably.