I have to admit that I think this is very cut and dried predicament; when Charles becomes King his wife automatically becomes Queen Consort--as the law now stands that is the progression of things. She can't be HRH The Princess Consort until the law changes--and it appears that there is no rush to do so on the part of HMQEII. That tells me that this whole Princess Consort title was a diversions for the Diana-ites out there. Which brings me to my other point--the idea that Camilla, who is not using the style HRH The Princess of Wales out of respect for Diana, should have to take a lesser title than her husband out of respect for Diana yet again (who never would have held the HM The Queen title) really just does not make any sense to me at all. The only scenario I can really think of that is similar is that of King Leopold and Queen Astrid; when she died there was such an outpouring of grief that he ended up secretely marrying Lillian--who become HRH The Princess of Rethy---and whose children were not in the line of succession. That is so insulting, I can not even begin to imagine how I would feel given that situation. I honestly see no reason why Camilla cannot be Queen Camilla--and I have read this thread many times--and it all comes back to one thing:
upon Charles ascension, Camilla automatically becomes Queen. Unless a letters patent is issued prior to QEIIs death. If the letters patent is not issued, then Camilla would be in a situation where she would have to lose her title--which sets a dangerous precedent. So, it all hinges on what happens now--and I think that QEII is waiting it out.
As an aside, I have particularly enjoyed the discussions about the Duke and Duchess of Windsor. In the past I have agreed that she should not have held the HRH, but I have come to the opinion that it was an injustice to her that she did not receive it as her sisters-in-law held it. They weren't divorced, true, but Edward did give up the throne for her.
One more thought--if Camilla does become a Princess of the UK in her own right, as Phillip is one with the Duke of E title, would she receive a title that she could pass to her son?