Macro beauty photography usually means the use of macro lens to capture all the detail of skin, makeup and over all look. It requires expert approach to all aspects, lighting, photography, makeup and, of course, retouching. In those kind of photos everything is on display and needs to be the highest possible quality. No error will go unnoticed.
In my retouching my main goal is always to keep the realism intact. It is really easy to cross the boundary and make the image look more like digital painting… and there is nothing wrong with that if that is your goal. However, I like when a photo looks still like photo, skin still looks like skin… and yes, that means keeping some imperfections in. How much, depends on the image and style.