However, what I can say as an ex-dev is that sharing a release between two platforms, even both based on windows IS GUARANTEED to splinter resources. So we can definitely say that the XBOX version is at least partly responsible for a slowdown in development of ED, if not directly responsible for nerfing the graphics.
Being a dev myself, I think thats a pretty crazy response coming from an ex-dev. No idea what you have been working on and up to what level, but splintering resources doesn't have anything to do with nerfing graphics. The thought alone is just hilarious.