I don't think AK was necessarily a paragon of virtue.
She clearly had attributes/skills HMQ valued highly.
But she wasn't known as AK47 for nothing in respect of how she allegedly leveraged her close relationship with HMQ to her advantage not just with staff but with family.
For someone so loyal to The Crown you'd have thought Charles/Camilla would have wanted to retain her no? But they couldn't get her out quick enough.
Maybe some parallels to be drawn here about people who cultivate "upwards" relationships only that ultimately backfires when you don't play a long game and you realise you are now dependent on people you disrespected as peers or subordinates.
In this respect I remember being quite perplexed by the relative respect H&M displayed to HMQ/PP in their statements and OW interview and H in Spare in contrast to Charles and William/Catherine.
It's not as if the succession wasn't clear, nor that there was a limited window wrt the status quo.
Baffling tbh but I can only conclude they overestimated their own skills/appeal/ability to monetise so it didn't matter as they would effectively run their own Court/Royal Franchise in the US.
I sense that they are not necessarily very good strategic thinkers.