I don't know if I'm just being oblivious here but I don't see that QMII is looking any more frail now than earlier this year? I definitely see that she's struggling with the osteoarthritis, but in spite of that I think she looks really good – especially and surprisingly so for a 75-year old who has just finished a two-week long visit to Greenland.
About Joachim, I agree, he should have made an effort to be there. Them skipping it this year is just as ridiculous as the year when Mary and Frederik got delayed in traffic. It's a scheduled photocall and one of very few scheduled events a year. It wouldn't have killed them to work their holiday around the photocall – especially not if they're going to Gråsten anyway.