Effects of Revolutions and Renaming?

[Stelmack]

So I played my first game of RoM, and there was something I noticed. Playing on the second to easiest difficulty (fearing that revolutions might end my game sooner then later) revolutions are barely common at all. I managed to own 70 cities on a gigantic map size, have triple the score and technology of the next best nation, and the only rebellion I ever had was a colony on the other side of the world that I crushed. Obviously the lower difficulties are a bit easy, but there were some problems that I was aware of.
I was playing as the Americans and after I became the American republic, my name never changed again. I was using President, Democracy, and free market (those are what I can remember) and it still was a republic. Is this because i owned vassals, or should it have changed?
The rebellions were always barbarian nations. Only once were the rebels Siamese, but I had crushed their nation and their old capital had revolted. Once. I crushed it
All other revolutions were barbarian though. That led me to another problem, a different continent had 4 nations on it. Every single one had a rebellion and the rebellion toppled the old nation. Because each rebel faction was barbarian, they shared troops, and used that to take over the entire continent. They had stacks of 30+ troops going around of some of the most advanced units pre-gunpowder, and not one of the nations had turned into a minor civ. Even at the year 2020.

Anyone else notice any of these problems or maybe Im doing something wrong?

 

[45°38'N-13°47'E]

Barbarian rebels depend on how many civs are already present in the game: if you've already reached the limit of civs, then every revolution will spawn barbarian rebels. It happens the same to me in my current game. The only "solution" is to kill a small civ and then the next revolution will bring a new civ as rebels.