That someone is deliberately writing a lesbian in a leather fetish costume sexually suggestively?
That perv Rucka! How dare he?
Look, it's a superhero comic. Batwoman's costume isn't particularly lascivious by male or female superhero standards. (You want a real "leather fetish" costume? Try the Midnighter's.)
I really have to wonder if this article would have been written if Kate Kane had been established as heterosexual. I mean, "a "safe word" if you will"? That's on a par with Frederic Wertham insisting that Batman's armpit in one panel symbolized the female genitalia.