I wish everybody luck asking for upgrades on EK.Only Station Manager can authorise it and then have to give written reasons why!! Check in staff and Pursers risk their jobs if they do it and then get reported by their colleagues.
Why not try a flt with an other carrier if you want an upgrade - almost everyone else, if they know you are crew, will try and help.
(I have to say that I think this EK policy stinks - a bit like a lot of their man management policies!!)
Best of luck!!