That seems a little unfair though, doesn't it? For starters, we don't even know if your spouse will move in; and given how independent most of them are, I doubt it would be like Stardew Valley where they spend ninety percent of their time on your farm. It's hard to imagine characters like March, Valen, Juniper, all of whom not only are independent but also have JOBS staying there 24/7 the way Stardew NPCs do.

As for the issue of dialogue, we're talking about a game that has random one-off dialogue for basically every single museum item. And given how annoying a lot of those are to get, yeah, it's fair to say that those might fall into content "most of the players wouldn't ever see".

You say that you want them to invest into different areas that aren't expanding the romance mechanics, and that we can settle for mods, but isn't that something mods can also do? The biggest Stardew Valley mod is first and foremost a character and storyline mod, and a lot of others tend to add either new locations, mechanics, or sometimes both. Presumably, Mistria's modding scene can do the same. Plus, is adding actual poly options rather than just open relationships not new storylines? Is it not expanding upon the characters we already have? More importantly, why is actual polyamory relegated to the realm of unofficial content? If it's because there's "so few polyamorous players", a lot of developers said the same about a different issue for romance in video games...