A photo I took in 07 of our next Governor General, at a reception with Major General Lewis Mackenzie.
I predict Johnston as a GG who delivers any decisions by the books and without any large changes from the position. He's always allowed any innovations or hesitations to happen underneath his presence and accept advice of his administrators so that could be with the PM as well.
Notably for this blog, he chaired the National Roundtable on the Environment & Economy - a federal advisory group that puts out reports ahead if its time. At the University though, the leadership on sustainability initiated by president Wright didn't seem to remain a priortiy.