Recently, I've been listening to an audiobook of Emma by Jane Austen and, having seen adaptations before I ever picked up the book, and rewatching the 2020 film adaptation, I have thoughts:
1. The 2020 version of Emma is closest to the book (imo) and most of the choices for changes within it are primarily designed to serve the medium of film compared to book (eg: Miss Bates catching Emma in the haberdashery as the revelation about Jane Fairfax's supposed illness, although I don't always agree with them)
2. Miranda Hart as Miss Bates is some of the best casting I've ever seen. Miranda Hart brings such a specific tone of social awkwardness balanced with genuine heart to the role that Miss Bates becomes more than the potential characature (spelling?) than I've seen elsewhere
3. Mr Woodhouse is the Mrs Bennett of this piece and I'd love to see both of them played more seriously. As if their anxieties were founded, even if they're still frustrating to be around.
4. I LOATHE Mr Frank Churchill (that's not relevant, I just had to say it).
5. Anya Taylor Joy brings a really lovely quality to Emma's snobbiness that doesn't make Emma unlikeable but still gives her plenty of room to grow. And she convincingly plays Emma as believing she is doing the best for everyone.
6. In this version the addition of the serving class is done so well. They're not "present" in the book as much as a standard expectation of gentlemanly life in Austen's experience, so she neglects them. I really appreciate both that they're visible in this adaptation and that they have opinions and feelings about stuff, even if it plays out silently in the background. It just gives the whole world a deeper quality that I appreciate.
7. I don't super love what they did to the younger Knightley (Isabella's husband). In my impression from the book, Isabella and her father's eccentricities are worth the difficulty because it lets him be with Isabella. He's not calm like his brother but he's calming/reassuring to Isabella and he just has none of that in the film.
(I haven't finished the audiobook yet, so that's as far as my opinions go.)