Scenario options are probably harder than "medium effort", because of all the pitfalls they offer. First, they'd need to be known in the lobby to all clients, preferably even while they're still loading. So both selected options and option definitions would need to be part of the initial join info. Then they'd need to be synchronized similar to player infos. Then you have all the trouble of savegames, records, runtime join, savegame resume in network, etc.

Then, there's the localization issue. Unless you're fine with just displaying the option to all clients in the host language, the selected options would need to be paired with the localized version of the option definitions. Localization was actually the reason why I skipped the thing last time someone came up with it.