BTW. I'm currently playing as France and had no problems with stability despite wars with Burgundy, Germany and Spain. Yet France remains solid at at least 20+. Why shouldn't Burgundy be the same? I've never had any such problem with stability in any other civ I've played in over a hundred test games. And I'm not the first person to point this out.
Spain also has really good stability. I can grow 15+ cities, occupy Burgundy native land, and take all the N. African cities, and stay Solid or better. Of course, Spain has that awesome power of +2 stability per city. That said, there seems to be some very severe stability penalties upon switching civics. As soon as I modernize my civics away from Manorialism and Serfdom, I'm collapsing.
Do we know what the civic bonuses and penalties are? Are they working properly, and not too severe? Are there hidden bonuses/penalties for certain civics based on eras?