The changes at Manchester United this summer have been fast, often brutal, and always with sporting improvement at the forefront. The impact of Jason Wilcox, Dan Ashworth, Christopher Vivell and new CEO Omar Berrada have been keenly felt already. Manchester United would frequently meander out of the blocks during Glazer-led transfer windows but this year had two big-money, first-team signings sealed by mid-June; fighting off AC Milan and Real Madrid to land both Joshua Zirkzee and Leny Yoro. Further changes to the coaching department, meanwhile, not only freshens things up behind-the-scenes, i…