So are The Highlands with its 8/8 Boss is more of a mid-level board than The Dungeon with its 12/12 Boss?
The more I read about how The Highlands is set up, the rewards for going there and that you will end up in the middle region if you want to, it seems this expansion helps a player on the way to the Crown.
The Dungeon however seems hard enough it is a place to go instead of the Crown. After you beat the Dungeon, getting to and taking the Crown should be a cake walk.
Maybe I am making a false distinction or is that a fair description? I am trying to decide which big box expansion to get and right now I am thinking The Highlands.