People always trot out that Diana was just as much to blame for the failure of the marriage , I don't agree. Yes Diana had affairs (later on after she realised she had meant very little to Charles). If those affairs were with married men that was very wrong of her.
But at the time she agreed to marry Charles she was a naive teenager (19) from a troubled broken home, despite her family wealth. The Royals (and her own family) intended her to be an uncomplaining aristocratic brood mare. Charles was over 30 and had had many relationships, Camilla was married with children. Diana thought she was getting a fairy tale, but she was deceived from the start by Charles, Camilla and all the Royals. Camilla also cheated on Andrew Parker Bowles of course (as he did to her).
So no, I don't think much of Charles and Camilla. He's a spoiled ineffectual man who wouldn't have gone far in life if not for an accident of birth. I won't watch the coronation (well maybe highlights on the news). Probably we might go out for the day.
The general public were mostly fond of QEII partly because she was there for so long, and seemed a breath of fresh air when she took the throne back in the 50s, she was young and fairly good looking. They continued to like her for reasons of nostalgia. She never said much so you could project anything you wanted on to her, imagine she was your granny etc. See all the Paddington stuff.
They won't be so fond of Charles, I am pretty sure, and inevitably he won't last that long, due to his age. QEII's death was the beginning of the end for the Royals, the world is changing.