also, multiple nobles from the same family playing together isn't necessarily a good solution. though it's widely prevalent throughout battlemaster, I think it's something that in many ways takes away from RP and the funness of the game.
when it's done right, with seperate RPs for both family members, its acceptable. but more often than not you have one family member who is active in discussions and the realm and one silent zombie who walks around with a unit blindly following orders and managing an estate.
He didn't say to make it possible to have 3 chars per continent. Characters would play together any more than they do now.
Furthermore, it's generally accepted that BM needs drone nobles for realms to work. Without them, most realms would collapse, or be too small to do anything.