Even the man himself could understand why first-team opportunities were in short supply at Rangers last season. Ousting the club’s Player of the Year from the starting XI, after all, is easier said than done. And with Jack Butland almost immediately establishing himself as a talismanic figure at Ibrox, a place on the bench was realistically the best his Rangers rival could hope for. But still, Robby McCrorie might have felt that opportunities would be a little more forthcoming. McCrorie won’t have expected to be a regular starter either in the Scottish Premiership or the Europa League. But sur…