In my experience — and I'm not shooting fashion per se but I do shoot a lot of theatre — moire from the D800e is negligible. And as you said, I'd rather have the slightly increased sharpness. It makes post processing that much easier.
The issue of moire and, for that matter, the issue of diffraction have been way overblown by the photo community at large. If I see moire, I'll get rid of it in post. If my DOF needs are paramount, I'll go to f/16 or f/22 and not worry about a slight loss of sharpness due to diffraction.
Jon Kandel A New York City Nikonian and Team Member Please visit my website and critique the images!