Ugh.
I read Dahl with my kids, he’s arguably one of the best children’s authors ever (though I do think that in modern times he likely would have been cancelled for some of his more problematic views, so maybe it’s a blessing we get to keep him at all).
I see no problem with the original use of language, where it becomes less inclusive it offers a teachable moment. I have a problem with losing the word fat - some people are fat and whilst I get the point about not shaming people, if we lose the word altogether then we will just need a different word which will in turn become cancelled.
Formidable female > formidable woman, on the one hand it’s heartening to see the W word, on the other the alliteration was wonderful and I expect deliberate. There is no need for this change. (I wonder if the very masculine Miss T will be claimed as trans at some point though).
The only language that can be removed in my mind is the very worst, eg the N word. To my mind Christie and Blyton are the worst offenders of this kind.