I love your demo so far! I like how the LIs all have interesting personalities. The severe customs official with the heart of gold vs. the elegant adjutant who suffers from possibly PTSD related depression vs the saucy rich tradeswoman who's also a crook. One of my few issues is that the music can be a bit samey, but I didn't mind it too much.
I'm of two minds about the LI's introductions. On one hand, I like the choice to introduce them in a not particularly flattering way (like d'Albedy's drunkenness or Busch's sexism), because that's the 1820s, baby. But on the other hand, I can see how that would turn off potential players.
It would be nice to know the LI's first names, though it's true that first names were rarely used in this period. What are their first names, btw?
One idea that might be considered, is that the conversations with Mrs Dunker could be tailored to the various romance options. Like you could have an option to discuss d'Albedy, Busch or Weissmann with Mrs D. and that could cement your romance path, if that makes sense.
Another possibility that might be fun is choosing different outfits for different events, like Ambition: A Minuet in Power. Of course this would also add a lot of work for you guys. Possibly this could be a potential stretch goal if your KS does well?
Anyway, this was a lot of fun, and I hope you meet your goals. I will be telling as many people as I can about this!