Rx Shx aren't necessarily "no good"; They are "ok".

Shimamo over SRAM is totally a personal preference thing - they both make good stuff and people tend to get all worked up about their favorite.

As for the whole WSD thing...(I don't want to sound condescending here) do you know what it is, isn't? Primarily it is a geometry things, for "typical" female proportions that would be long legs with short torso. Many women ride men's bikes just fine ( I have three mens, one wsd mountain bike) Overall fit is most important - stem should be tweaked for best fit, not just to make it wsd. Unless of course shorted top tube feels better. I just freak out about this stuff, I know too many people on the wrong frames that some well meaning shop has tried to make fit with a stem change, when really the bike is overall the wrong size.

The thinking on handlebars is changing too - wider can be more stable.

Sounds like you have a good shop you are working with.