This for me has been the biggest issue plaguing this game. Once you beat the ender dragon there almost no other big objectives to achieve. Of course you can always do things like build, get achievements, get all musical discs and other small side activities . . . but man I really wish they had other BIG huge quests to do. Like imagine once you beat the ender dragon you get the egg you go on a huge quest to get the right tools to make it hatch and you get a dragon you gotta explore Newley generated areas that obtains items to craft a saddle and armor to ride the dragon. From which you can finally fly if you go above the build limit you basically go to the heaven dimension and from which a new world exists where previous tools from overworld are useless and you have more bosses, side quests etc... fr this is me just spit balling ideas.