Thought about adding it to Wildmana. But decided to make my own Revolution mechanic. Still a lot to design and playtest though.
If you play Noble Houses of Erebus Gameoption and gain the Support of House Ghallanda but don't stick to their trading agenda, you will face Revolutions (and you are given the chance to play the revolting opposition if you like). But other Houses still need to be done and the whole mechanic needs to be balanced for them.
lol, i did not read the documentation on noble houses, so the first time a house siezed a city and declared independence came as quite a shock!
now that i know about it, though, i really like the mechanic. i missed revolutions coming to FfH2 from RoM+AND.