I'm 5'4.5" with longish arms and legs and I don't need a WSD, although this isn't to say I would reject one out of hand.

I ride a 49cm unisex/men's bike. I do use a shortish stem 80mm and short reach bars. I don't use a setback seatpost, but my seat is about as far back as it can go with the non-setback post (and I probably should get a setback seatpost).