"But I'll leave it to others to discuss the proper decorum for a governor-general."

OK. I'll bite.  For starters, the GG should be respectful to Canadians and not go out of her way to offend them or their beliefs.  She should never use a mocking tone about anything or anyone.  And she should take a week and learn about the history of the GG's role.  She is now the Queen' representative in Canada.  Nothing more.  She is not Canada's new Head of State for the next 5 years.  Every time she speaks she should ask herself: 1) would the Queen feel comfortable saying what I am about to say; and 2) is what I am about to say in keeping with the apolitical nature of the office and my need to set a good example for all Canadians.  So far, she has shown little sign of having read the "How to" book for new GGs.