A week or so ago there was a discussion in the Democracy 4 Discord server (link: Democracy 4 Community) about the addition of new voter groups. One person suggested the addition of blue-collar (industry) workers and white-collar (service) workers as voter groups. This would be such an interesting update to the game and several people on discord including me would love to see this added to the game.
Another thing discussed on discord was if voter groups were made moddable. So that people can make or add their own voter groups using mods.
I don’t know if any of these things are possible to add to the game and how hard that would be but I and several others think it would be a great addition to the game.