Zatanna getting her ass handed to her actually works fine in this situation - her weakness has always been her focus-ritual.
That being said, she really doesn't need the backwards-talk to actually cast spells, though it takes more effort. It also is true that she shines more when she has time to prepare - Zatanna isn't really meant for frontline action (though she is pretty good).
So getting soaked in a tub and blubbered? check, very possible. But yes, I do wish they'd show that she'll have her own dish of revenge later on.