This is a huge system that has been in the game for a very long time. It was added when regions switched hands rapidly, to make people consider holding them longer. It was also added to dissuade looting back when that was rampant. Both problems that we don't have anymore.
But my main interest in considering to remove it is not so much the complexity as that it doesn't fit to the vision of the game I have anymore. I would like to move closer to a "the peasants don't really care that much about which flag flies over the castle" vision. If the peasants have an opinion, it should be much more localized - they might like their lord or not. But I don't see why the peasants should care about realms.
