I think one possible issue doing it that way would be that we plan on bringing lots of players in early on using recuitable generals. With so many generals for the faction, it could be a long time before we see more than one or two marriages and births, at least until we expand far enough to trigger them. This would make it very difficult for early players to have an eldest son to pass their land to.

Quote Originally Posted by Ignoramus
Regarding the wills of vassals, I really am against them being able to bequeath their land at will. In reality, they hold their land of the lord and it's ultimately their lord's. If they die and have natural sons, they should be able to pass their land on to them. But if they don't, then the land should revert back to their lord.