The important point, I think, is that the adjustments cannot be all one-sided, either in favor of the Palace or the girls coming in.
I have recently read the Brandreth-portrait of the marriage of Elizabeth and Philip and what he writes about Philip's situation when Elizabeth wanted to marry him.
I personally got the impression that Elizabeth is at the heart of the whole problem. Not that she is responisble but that her attitude towards duty and personal sacrifice for the sake of the monarchy still allows her courtiers to treat the Royals as mere employees and representatives of the firm instead of being the firm.
Brandreth tells about how the young queen never for a moment thought to share her work as a queen with her husband, that he never got to see any papers she had to read and that he never was allowed in when Elizabeth worked. While this surely is the correct way to deal with the situation, it tells a lot about Elizabeth's view on her husband as being more or less just a part of her private life. And I think we all have an idea how important her private life is to her when compared to her duty.
So queen Elizabeth clearly chose her courtiers over her husband, understandible, of course, as she, when she was was still Heiress Presumptive, had been "allowed in" as a very young and unexperienced member to the most noble circle of her father's inner court, the same court /establisment which had managed the Abdication Crisis and which was therefore to be taken utmost seriously.
It's interesting to read (in Bradford, Dimbleby and Brandreth among others) how Charles' "court" is considered to be an absolutely minor and unimportant part of the monarchy and how "Buckingham Palace" treated him, his ideas and his chosen advisors accordingly.
I think it's this way of the "Grey man" to view all Royals besides the queen as unimportant on knowing that you can convince her anytime that something must be done out of duty which made life so miserable for Diana, Fergie, Mark Phillips and Snowdon.While Philip according to Brandreth organised his life in a way that he had not so much to do with these advisors of his wife.
I have no doubt eg that the fact that both Anne and Charles used "Mountbatten-Windsor" on their marriage certificate was a direct blow from them against the courtiers who have belittled Philip in that respect. because I don't think Charles or Anne care much about the Mountbatten-part as this has no historical background but they wanted to show their support for the man who fathered them.
I have no doubt Charles will change a lot when he becomes king and that he will see to it that William and his wife, if he marries before his father is the king, will find shelter and support within the Clarence House/St. James' s Palace-household - and be it only (for those who don't like Charles) that he blames the BP-treatment of Diana partly for his failed marriage and want to make sure his own son's wife is better protected and supported than Diana was and that she knows about that and feels safe.
I have equally no doubt that if Charles was already king, we would see a different way to deal with Royal girlfriends: IMHo it was no coincidence that when Catherine stayed at Balmoral, she was snapped receiving advice from Charles when she went out shooting. Charles will do nothing to upset his very old-fashioned mother, so he does not include Catherine too much in Royal events and does not allow William to do so apart from events where a) William has a right to bring his girlfriend like graduation or receiving a knightship or b) someone else takes the responsibility like the bridal couple at a wedding, who can invite Catherine as their friend.
But as he did with Camilla he subversively works for his own aims, just like, when Camilla was snubbed by Royal Protocoll at the Cutsem-Grosvenor-wedding and Charles was helpless to do something, he simply did not turn up either, so showed his support for Camilla and forced his mother to acknowledge Camilla as his HRH-wife. I believe the "Duchess/Princess Consort-stuff was the reaction of the queen's court, who convinced the queen it would be wiser to act that way..
All IMHo, of course, but I simply don't see Charles and Camilla condone the behaviour of the current courtiers once they are the king and his queen.