I am 5'9" + and have 2 road bikes (59 cm) as I have long legs and arms. As far as I know, WSD bikes were designed for women much shorter than you and I.

I've been riding since 2003, probably over 50,000 miles with no problems on my bikes. Sometimes I reverse the stem depending on what kind of riding I want to do. I even tried an adjustable stem on one of my bikes, but recently changed back to its original stem as it wasn't as comfortable as my other bike.

Not sure why you are concerned about WSD. I suggest you try out different brands and if you need to play around with the stem have the shop adjust it for you.

The big issue is making sure a bike is compatible with your body measurements. Any good bike shop should be able tell if a bike needs to be modified to fit you.