Add Difficulty Presets
I would want to see difficulty presets added because it would make it easier for new players to start a new game and it will make existing players selecting advanced world settings easier and faster.
Difficulty Presets would change certain advanced world settings without you manually selecting settings which would speed up the process of starting a new game.
For example: You choose a hard difficulty preset. This means that container sizes would be reduced. Grinding blocks would take longer and meteor showers are on. Now the game is harder.
I hope this feature someday will be added to the game!
Example Difficulty Presets: