Creag Robertson’s Rangers exit has added yet more uncertainty to the current situation at the club. It means there are now multiple key behind-the-scenes Ibrox positions lying vacant after the director of football operations announced he will be stepping down to ‘pursue new opportunities’. He will continue to work a notice thought but it just means Rangers now must search for the right fit in yet another role after some other high-profile departures, names CEO James Bisgrove, chairman John Bennett, academy director Zeb Jacobs and sporting director Ross Wilson. All of the above will need replac…