Prince Edward decision should be put back in context.
First he married in 1999, in a back end a a terrible decade for the BRF, that saw the divorce of Princess Anne, the separation and the divorce of Prince Charles, the divorce of Prince Andrew, the death of Diana, Princess of Wales,and the fire at Windsor.
Then Prince Edward was not supposed to be a working royal, back then he was a tv producer, and Sophie was supposed to keep her communication firm. They tried to pursue that avenue, but it was not feasible and things changed as they changed path. Back then they wanted to shield their future children from the press, given what the family had gone through during the preceding decade.
The 90s were a tumultuous time for the "Firm" with all the events happening as you point out, alvinking. Something had to be done and it was then that the little known of group called the Way Ahead Group was formed. Kind of like a high level crisis resolving group of a corporation would be.
This group is no longer in existence but perhaps some of the decisions that were made back then changed the direction of how things were going to go into the future and starting in 1999 with Edward and Sophie and the Queen implementing that the Wessex children would be styled as the children of an Earl (and eventually a Duke), it set a precedent.
This precedent though would not become apparent until now with Harry and Meghan expecting their first child. It wouldn't have affected William and Kate's children as, due to the Queen's longevity, there was an heir to the heir to the heir to the throne (that's more heirs than William has on his head) and HM, The Queen put into motion the changes that created the Law of Succession Act of 2015. There then, was good reason to also issue letters patent that the grandchildren of the heir to the heir to the throne would be born HRH.
The Queen and the Duke of Edinburgh were in a new era of being great grandparents. The titles and styles of Anne's grandchildren were never any kind of an issue because their parents weren't titled and styled from birth due to Mark Phillip's declining on a title.
Harry and Meghan are the first couple to be expecting a child where Edward's precedent would and could be set into motion. I'm of the opinion that what we will see is that Harry and Meghan's children will grow up and be titled and styled as children of a Duke similar to Edward's children.
This won't come into play should Beatrice and Eugenie have children either. Descending from the female line, their situation will be similar to Anne's. We saw that Jack Brooksbank was not offered any kind of a title and I imagine the same will happen with Beatrice's husband.
This is what is making Harry and Meghan's situation so unique to watch. I believe we're seeing a plan put into action that was formed twenty years ago. Its not a "royal snub" or something directed at Meghan or indicative of anything but an implementation of how the "Firm" saw the "way ahead" years ago.
This also wipes off the board the idea that it is Charles, himself, that wants to streamline the monarchy. I think its possible that Charles was one of the group that was all for it but it was a "Firm's" decision and not one person's.
Yeps, the 90s were the times of the "annus horribilis" but out of the ashes, the Phoenix rose again.
https://www.express.co.uk/news/roya...ilip-prince-charles-diana-windsor-castle-fire
Another aspect of all this is that regardless of titles and styles of a person, it does not, at any time, affect their place in the line of succession to the throne. Lena Tindall is 19th in the list with Prince Richard, Duke of Gloucester (a royal duke) is 26th.