Oh yes, completely agree with all of your Wimsey opinions, I don't mind the bananas explanation for the arsenic in Strong Poison because that kind of thing happens all the time in murder mysteries, but I do remember having the exact same thoughts on my first read of it.

You may find this article on Sayers and antisemitism interesting (though it does have some spoilers for books you haven't read) which discusses it in the context of her personal life and has a lot about the ambiguity in Whose Body: https://momentmag.com/curious-case-dorothy-l-sayers-jew-wasnt/