i dont play survival, but maybe try doing all of them?
Remove the water
Fill the world with blocks,
Fill the walls to make it all a spider cave
And paint all the blocks black
Changed my vote to “Claustrophobia”. I really love the different twist, and would love to see how people handle bosses like Duke, Plantera, and EoL. Also ores would be super abundant. People would be moles digging through everything while others follow paths
Ive battled EoL in a tight arena before and it was a nightmare that took me 246 attempts before killing her.
Its about a Fun challenge. Its not really about the fast progression. Its about how well people can adapt to the new environment, while still progressing.