Violent sequel doesn't benefit from gender change.
Parents need to know that kids will see recurring, vengeful beatings and hear a moderate smattering of "hells" and "damns." As throughout the Karate Kid series, fighting is presented as the solution to most conflicts/problems. There's also reckless driving, bungee jumping, overtones of teen sexual harassment, and lots of showdowns. But Julie is also ultimately a strong female character who learns to believe in herself.