I'm wondering if and when Charles becomes King he will remove the Harkle titles. This will leave HFW with nothing and H will still be a prince as he was born of royal blood but this won't make her a princess! That could be a blinder under the excuse of trimming the Royal Family and them no longer being 'working royals'. I remember seeing an interview with William once where he said something like, but more politely, 'if people piss me off then I'm finished with them' so I suspect Wills would be behind this 100%.
I've just been on Twitter and came out of it rather quickly, those sugars make me want to