At least the Diana/ Charles disaster showed the royals that those kind of arranged, semi arranged marriages were no longer suitable in the modern era. Back in the day, Diana would have been like Alexandra and Charles like Edward VII, is my feeling.But in the modern era, that wasn't going to work, and the marriage collapsed, as it most likely would have, Camilla or no.They didn't know each other well, and Diana was so young and was in love, Charles was older and wiser true, but he felt forced to go along to some extent though I think he was going to make the best of it, and try.After all, he did not know her completely,and she didn't know what she was getting herself into.It was a recipe for disaster, and while a more compatible couple could have made it work ( marrying not knowing each other that well, semi arranged match) even in the modern era, ( George V and Mary of Teck was a arranged marriage, basically and it went great), Diana and Charles were just too different to make it work.