I am using ArcMap 10.3.1 and am still baffled that there still doesn't seem to be an option to show a group name in your map legend. I still only show different ways of showing the Layer Name and/or the heading. I thought for sure by this version, that would have been added since it's been requested for so long.
Does anyone know something different than I do or have you come up with a work around for this issue if not?