Certainly not stunned by this news - actually, I think it is best for all involved. As the linked article states, Berry may have been the future GM-in-waiting here on the North Coast. But when John Dorsey was hired, that became an awkward fit.
Bottom line, Jimmy Haslam chose Dorsey because of his track record and experience - and that left Andrew on the outside looking in. Andrew is a very smart guy, he knows how the NFL works - and now he gets a better opportunity with the Eagles. Win-Win.