I cannot imagine that they'd be that foolish. Especially after how well-received "badass little girl" characters like Hit Girl and X-23 have been received on film.
I'm hoping that her skills are going to be played as a "surprise" for the non-comic book reading audience, or it's a case of "she's awesome, but she's still a little kid. So she cannot do everything herself." We'll see soon enough I guess.