It would be nice to see the ability to jump between creative and the other difficulty modes in game whenever you wanted, I have a few files going and we want to create a giant structure in creative then switch to hard and gather and collect to build everything else. I get some people might think it ruins the game but sometimes It's nice to make a huge structure without needing to spend days gathering grass/weeds

As of the release of public test 11.0 today, this still has not been fixed. Just about all sandbox games have the capability to switch between creative and normal, and I’ve seen complaints about the lack of this option going back to the release of the game, it’s not new. Obsidian should have fixed this long ago.