The punch blades I can agree with. They are just there for the trait. Only part of her design that feels lazy to me. Her costume is far from bulky. Compare her outfit to Batman's, you can tell her's is designed to be more agile and less plate-armor.
As for her cowl? There are several comics where the cowl is tall like that. Here's an example
As for her moveset, I don't see anything wrong with it outside the fact that her damage output is ridiculously low(apparently). She's quick, nimble, ninja-like...a better Batman than Batman.