It is less complicated than it looks, once the terms are clear.
The rules are not new. What is new is how many people they now apply to.
What actually changed
The exceptions matter more than the rule, and there are three of them. Nobody is required to explain this to you, which is half the problem.
Where to go from here
Nobody is required to explain this to you, which is half the problem. The figures move about, but the direction has been the same for three years.
Where the confusion starts
The figures move about, but the direction has been the same for three years. The exceptions matter more than the rule, and there are three of them.
None of this is urgent, but it is worth an hour before the next renewal.