Rather than looking at AF's mistakes and it's staff's attitude, here is some plain physics: The forces acting on the implant/bone resulting from the 10 degree slanting of the lie-flat seat are much, much, much lower than from the forces resulting from standing (let alone walking) for 11 hours (which was against your surgeon's explicit advice) and why watching the actual operation is an anatomical impossibility (by the way, a hip replacement with an epidural instead of general anaesthesia is routine and not a sign of... anything by the patient), I am sympathetic with your -failed- wish to be upgraded to First, but other than that, much ado about nothing

PS Six operations during the last 10 years, including an open heart one and an aortic aneurysm, and lots of moaning about several airlines' long haul business class seats.