Another factor that increases the limit is your dynasty's prestige. He explains, “The vassal limit will be higher for rulers of higher tiers, and for rulers with higher diplomacy skill. On the official forums, Tobias Bodlund, a scripter on the team, explains that one of the major changes to the game is the addition of a limit for the number of vassals a ruler can have without getting some penalties.
The team at the Paradox Development Studios has been criticized by some fans for aiming too low with the new Charlemagne expansion for Crusader Kings II, and the company is now delivering updates on the new content that will be offered both via the free associated patch and in the actual release.
