Bigger more realistic trees
Bigger and randomly generated dungeons
Bigger strongholds
Amethyst tools and armor
Copper tools and armor
Dagger/Knives which can be thrown possibly, would have all material variants including amethyst and copper
Mobs spawn with better armor and weapons depending on how long you've been playing the world
Dynamite throwable tnt with smaller explosion
Turtle chest plate/shoulder pads and turtle knee pads, this is realistic because you can place turtle shells in these areas, no boots because you cant where them on you feet
More village biome types
Bigger village houses
More villager trades
Better chest loot
If you need help with your project I know a lot about custom items, functions, loot tables, and recipes
