I would really like too see more depth in general in the game, but i think rookgaard would be an amazing start point to implement ideas or custom content.
Having custom quests/tasks/systems for rookgaard would definely grab my attention and a bunch of people as well. I suggest tasks and custom mobs/areas for rookgaard and see how well that is recieved and later on maybe add to similar systems to mainland as well.
Let me know if yall have any rookgaard content in development or planned, i would love to know more.