Wow! Lots of new developments happened while I was AFK today. I can't say I'm surprised at the outcome that has been announced and to be honest, I find it sensible, compromising in its own way and hopefully will allow Harry and Meghan the life that they want to lead.
First off, my impression is that the "Firm" is like many, many other businesses and corporations in that they do not and will not accept "moonlighting". That is, being part of the business yet working elsewhere on the side. Harry and Meghan effectively have been handed a "you're fired!" notice from the "Firm" and with that, any venture they go into in the future (foundation, private patronages etc) cannot have any kind of connotation that would or could reflect on their previous "employment" with the "Firm". Hence, no HRH may be used and I would assume that the "Royal" part of Sussex Royal will be removed. This is common good sense when it comes to business and financial ventures. They're on their own in the work they do going into the future. Nothing can be used that even hints at their "royal" status that would allude to being endorsed by the monarchy's "Firm". Basically it would be like Beatrice and Eugenie being known in their places of business as Beatrice York or Eugenie Brooksbank. They do not use their HRH for business purposes. In this respect, what was done was to protect the "Firm" and not allowing that "half in and half out" which, to me, in the long run would end up being confusing.
Still, Harry and Meghan are still HRH The Duke and Duchess of Sussex within the family fold as Beatrice and Eugenie are still and always will be Princesses of the UK. Their rank and file in the order of precedence remains as it always was and will continue. They're still members of the British Royal Family and will still participate in family events and be warmly welcomed. They're not being exiled or banished from the family. Just from the "Firm" and its workings.
As with any new business venture, it holds the possibility of going belly up and flopping as its own stand alone venture. I think we pretty much saw that happen with the Wessexes in their early years. The doors aren't permanently slammed shut on Harry and Meghan and I don't believe anyone in the BRF would actively wish for them to fail. They, of course, would lose any "perks" held with being part of the "Firm". That's to be expected. As family, they're still entitled to the use of Frogmore Cottage as a residence but as they're no longer working for the family "Firm", they will be required to pay the going rent to use it.
As for Charles' coronation? Both Harry and Meghan would still attend as the son and daughter-in-law of the monarch, wear the appropriate dress as stated for coronations with even coronets and swearing fealty to King Charles. We've had no coronations in the British monarchy since 1953 so Charles may change some things such as the tiaras and coronets and robes etc... we'll see.
So, basically, the changes that are to be implemented in the spring basically all deal with the "Firm" side of the BRF and not the "family" side. I wish Harry and Meghan the best in all of this and that they find what they are looking for. I also believe that if needed, the family will always be there for them and they're not being exiled and banished never to have their names spoken again ala David and Wallis.
This is my take on things and of course, my own opinion. ?