If she really values someone with complete understanding of SW mythology, she should have asked Dave Filoni (co-creator of CW & Rebels) instead
I can't agree with this more. D&D are good at extracting major components of EXISTING story, reorganizing and translating them to a different medium (TV). Once the source materials are depleted (in terms of quantity and quality, sorry GRRM), (huge) gaps appear in their final product (GoT).
Whereas someone like Filoni took elements of the original mythology (SW) and weaved those into his original ideas (Rebels). This made the series feel and look like part of this grand universe while presenting his own fresh ideas and storylines.