How about some of these ideas?

The game starts with four Houses, each led by a family member. One of the Houses is designated as the Royal House, and is always ruled by the heir. The starting territory and soldiers are divided up between the houses and the King.

- All new provinces absorbed into the realm must be either assigned by the King, or the King must recognise the conquerer of a new province as its rightful lord.

- RGB's can be recruited when there are not enough avatars, however, they cannot lead a House, and cannot own more than one province.

- A new house can be formed if: (1) There is a civil war involving at rebel faction with at least 3 family members who are not leaders of a House (2) The King recognises or does not condemn the rebel group (3) The leader of the new house is a family member (4) The new house owns at least 2 provinces.

- The King can only control a maximum of 2 provinces. One must always be the faction capital, and the other must be a castle.

- The faction/royal capital can only be a city.

- The King controls 25% of the vote on declarations of war.

- Use the Influence system of KotR:

King = Stat influence
Duke = 3 votes
Count = 2 votes
Baron = 1 vote

- Major civil wars can only occur if: (1) The heir rebels against the King or (2) Half or more of the House leaders declare war on the King or (3) A succession crisis(where there is disputed succession due to MTWII's ridiculous "pick the heir" system).

- Minor civil wars(in-house wars) can occur if the natural son of the House leader is overlooked by the House Leader in his will.

Comments?