Practically every female superhero is "stacked".
People were disappointed in New 52's Starfire because DC had an opportunity to completely overhaul their old characters, yet they decided to turn Starfire into even
more of a sex figure, and completely devoid her of personality.
Starfire's always been a sexy, sensual, uninhibited character - and that's not a bad thing. Where you have strong women you'll have sexy women, and smart women, and idiots and "brutes" and on and on. Sometimes a character is driven by sensuality, and that was Starfire. She did have a personality underneath that sex bomb persona, but her sexuality was prominent.
So, when you have DC rebooting their entire universe, giving a lot of characters new personalities on top of new backgrounds, you can imagine how disappointed people were to see a robotic, emotionless Starfire having sex with a teammate at random in the very first issue - especially given the current rumblings among readers wanting stronger female role models. Even the original Starfire had a pop flyin'-go-lucky, cheerful demeanor - SOMETHING to give her life. The new Koriand'r? Sex doll.
I had put down the first issue of
Red Hood and the Outlaws after reading it and had no desire to read more. It was a gigantic turn-off. All the blogs and articles I read echoing my feelings only strengthened my resolve to never pick it up again, so for all I know the writer could have tried "fixing" Star to be more human. Even if he did, he left a very bad first impression on myself and many other readers.
(Also you can check out the
short Wikipedia entry.)