Yeah, well, after Henry VIII no royal ever would consider divorce either....the times they are a changin'!!
Since they are accepting divorce and the married/divorced mistress as consort, it is time to consider accepting abdication as well.
Charles should finally marry the woman he has always loved. But, because they both are adulterers, neither should hold the title, "Royal Highness". They have hurt so many people, and thus are very "low" indeed. Charles should never ascend to the throne.
However succession is not a matter of suitability but of progenity.
Make of it what you will!