About the number ranking, I meant both. It definitely sounds too modern to be used in the Regency era but it's also an expression I've only seen current teenagers use. Like I said, I was a teenager myself not that long ago, but this ranking system was not at all popular when I was in high school (among my peers or in media). Basically, it sounded to me like the writers wanted to adopt the most recent teen slang to cater to their very young audience. "He/she is a ten" is something I've heard only in tv-shows from the last 3 years or so, mostly said by teen characters.
Then again, I can't and I don't claim to be an expert in pop culture! If you're familiar with this way of saying, it's clear it wasn't born as recently as I thought. Maybe it had a decline, then made a come-back in the last few years? Or maybe my school mates and group of friends from 15 years ago were just consuming media that didn't use it, and nobody among us ever thought to rank people with numbers. It might have been widespread in other circles

To go back to the movie, this overall cringe modernisation was the general impression I got, both for the language and the situations. It felt like reading bad Regency JAFF where the author had forgotten the historical setting. Definitely give this movie a miss if you're still on the fence. If it gets a lot of views, this will only allow Netflix to green-light adaptations of P&P and S&S that Ron Bass, the screenwriter of Persuasion, is apparently working on. After shutting down the Snook&Fry Persuasion movie, Netflix looks like it wants the monopoly on JA and any Regency-adjacent adaptations, which doesn't sound promising, if this latest product is any indication.
Sorry, I've gotten totally off-track

Thank you for sharing your experience with the wonders of language!