I actually wondered if they were up front about the half in half out and had already been told no, the 2 year discussions had either been about trying to find a solution or hoping the couple would settle down to royal duties. They got fed up waiting for a solution to be found, so put out the statement and the website. The financial independence and the security were emphasised which also makes me think that they were the stumbling blocks in the discussions, so they tried to force the Queens hand but it did not work so a year on they do the interview with veiled threats of evidence and paper trails, all as Philip was in the last few weeks of his life.
I agree it was a career move, the Diana links etc etc, even in the interview she quoted Diana, I gave up everything for this family ( paraphrased).
Meghan will move on.
I honestly believe that the family are trying to keep some form of relationship with Harry however tenuous, so that they are there for him in the future. I personally think he will need them in the long run.