Feature Customization

Simply put, you should be able to customize what features you want in your world. Don't like the mega caves? Turn em off. Don't like the Warden and Skulks? Not in your world! Basically every feature, within reason of course, would become toggleable. I look to the mod Quark as an example. The mod adds so many features, yet allow the player to choose what gets added and what doesn't. This could be done in vanilla and would make the game more enjoyable for a lot of people, as you can tweak your world to be exactly the way you want it, with this feature, without this feature, etc. When a new update comes out, you would update your game as normal, but would then be prompted to select the features you would like to be turned on. It really would make the game that much better and may bring back some players who dislike the direction the game has gone and may have quit playing.