Already working on a Mod for 2.2. So many possibilities... I'm starting with something that will allow you to extend your administration, coupled with a spy-type structure that will force your citizens into happiness.
The Spy. Fast and incredibly powerful. Can be supported by an upgraded Intelligence Organization.
The Original and Upgraded Intelligence Organizations (Military). Costly, but necessary to keep up happiness in large settlements.
The Library (Civil). A structure that increases your Administration. Still have to add the upgraded version, than I'll upload the mod.