I could see higher ISO impacting dynamic range and leading to less moire, but I'm not sure that is a big factor. Moire removal tools and technique will probably be the main ways to avoid moire.
I expect fabrics will be a problem area. It could mean that we build a series of examples of problem fabrics that mean simply using an alternate camera. Photographers recognize problem light, reflective surfaces, etc. Those in this specialty area will quickly recognize problem fabrics. We will certainly have instructions from photographers for portraits that include some discussion of fabrics that are good for photos. Weddings probably fall into this category. I could see using a different camera for some images if the bride or attendants are wearing satin or raw silk.