The game has limitless untapped potential.

They could make whole new dimensions that are essentially a new game plus. With new, harder mobs, bosses with actual mechanics, new gear, resources, etc.

The creative sandbox aspect of the game is fantastic, I love creating things and seeing what other people make, but the survival aspect has had no real expansion. Their horrible balancing and failed combat update leaves no wiggle room for new weapons. The wooden axe does the same damage as a diamond sword.