I saw mixed reactions to the casting on twitter. Some people were ecstatic at the representation, while some people implied she can't act? I haven't seen her in anything that I can recall. It seems good on paper, and the only thing I can say is I don't think she's ginger.
BTW, I only read Batwoman for a little bit, but I distinctly remember her being a redhead with a red wig. Which was weird. The added length was part of the disguise, however.