If the campaign was a celebration of reality - then I think it would lack integrity to use a lot of re-touching.
These are after all - advertising images. Images are not real in the true sense - so there is good argument for leeway.
The whole craft of producing an image has manipulation at the heart of the process e.g. lighting a studio.
The campaign is about Real Beauty, not the Reality of Everyday women in the raw .
It is a celebration of the attractiveness of women of all shapes and sizes. It requires the context of the backlash against fashion modelling to make its point. A classic good old fashioned drama triangle - oppression, victim, rescuer.
It has to live in a highly glossy advertising environment - as commercial investment - who would be mad enough to say to shareholders - we are relaxed about the the plain, shot for real ordinariness of our advertising?
Get real - this brand aims to enhance a woman's attractiveness - be this about feeling good about herself or to others. It is not about a warts and all reality of life.
It would be an amazing tribute to photographer and crew to have zero re-touching.
So - hat's off to them if it transpires that this is the case
To dictate - no retouching at all merely forces more onus casting - oh that sounds like modelling brief?
Why don't the critics post some images to learn from?