I'd be down for that, or, better yet, a standalone game in the vein of The Sims Medieval (but with better customisation and true sandbox play (though I would object to an optional 'quest' mode) . Back in Sims 3 days, another regular on the forums and I came up with stacks of ideas for Regency-themed gameplay. In the real Regency era, gender roles were pretty rigid so I'd love to see all options available for sims regardless of their gender.
I'm a sucker for a Napoleonic era uniform so that's something I'd love to see . I'm not Lydia Bennet, honest!
I've heard people say that it might not have been a coincidence that Royalty and Legacy came out around the same time as new Bridgerton episodes, and while I can see that, I think the pack can probably only go so far towards replicating that kind of world. I haven't bought the pack yet, though I probably will get it eventually.