I'm sorry to come across all cynical and negative, but their "duties" are not in any way essential for the running of the country, apart from the weekly audience and approval of legislation maybe. Would anyone notice or care if they were to take a long sabbatical from the visitations and ribbon cutting?
I hope William is reducing homelessness with his input. What does he do or contribute to this cause though, is it just his support and presence or is he hands on and gives generous personal donations? Maybe he does and wants to keep it anonymous. Same for all the charities they support, but somehow I'm a bit sceptical about that.