The arguments you guys are bringing up are kind of making me cringe.

Like, the main reason the overworld is as static as it is isn't just to make the game "easier," it's to accommodate several different type of players by allowing them to go at their own pace.

And considering the potential challenge of duty quests/dungeons, there is already potential challenge in the game as is. The difference, here, is that the challenge is shifted into the right areas.