Well, this has been a problem for a while now; basically impossible for large, rapidly expanding empires to get factions happen to them even with a terrible ruler due to the ridiculously massive bonus to opinion while "defending against foreigners" from simple minor revolts.
Not only is it too large, but its far too easy to exploit, simply rubbing the revolt down to 100-500 men means they run around without sieging anything, and you keep the opinion bonus.
This breaks multiplayer beyond belief as you can essentially snowball without any repercussions from an early point.
IMO:
Minor revolts should not give any opinion modifier.
I hope this is changed upon ROI update.
Not only is it too large, but its far too easy to exploit, simply rubbing the revolt down to 100-500 men means they run around without sieging anything, and you keep the opinion bonus.
This breaks multiplayer beyond belief as you can essentially snowball without any repercussions from an early point.
IMO:
Minor revolts should not give any opinion modifier.
I hope this is changed upon ROI update.