For one there is no need to act rashly with this matter. The queen is still alive, she seems to be quite healthy and if her mother is an example to take into account, it could be decades till Charles accedes to the throne - if he accedes at all... (meaning that he is not getting any younger and his grand-fathers were not that old when they died: George VI. was 57 years old and died of lung cancer, while Andrew of Greece was 62 when he died of natural causes.) Mind, I don't hope it is going this way but it's still a possibility...
Times works for Charles and Camilla. It has been said at the time of the wedding that it has been Camilla's wish to remain one step behind her husband. It is certainly not something traditionalists like the queen or the POW wish themselves. But it seemed reasonable when one remembers the polls about the public's opinion prior to the wedding. At that time IMHO the most important step was to introduce Camilla into the RF and to see that she got the HRH-style without creating a public outcry. For that aim giving the public the information about a lower title for Camilla worked perfectly. Camilla is now accepted as HRH. In Scotland she is even accepted as the Duchess of Rothesay.
And the polls show that people come to like Camilla - even the media has decided that she's no longer worth inventing negative things about her. She is presented as warm-hearted, caring, compassionate and the pictures published show that the people she meets enjoy being with her. Now think about the future: who will want to strip this formidable and likeable Royal lady who so obviously makes her husband happy of a title that is hers by law? I'm convinced Clarence House already has found the right experts on constitutional law to come up to the then grieving couple and tell that that it's very difficult to get rid of the constitutional position of a queen. And then the new king and his wife will gracefully give in after polls will have shown that the public wants king Charles (or George) and his wife Camilla
And long live the king and his queen!