Use the sniffer to locate biomes.

Use a lightning rod to create a Copper Mace with a lightning attack.

Transport villagers with llamas by giving them the lead.

Use trial keys to lock chests, doors, etc.

Fill copper grates with water to create pipes

Paint, brush your pets, remove moss, farm string, and more with brushes.

Upgrades to make decorated pots more useful.

Use ender chests with hoppers.

6 new arrows and bows craftable in the fletching table.

Use copper to create tools and armor that change stats as they oxidize.

Use the creaking heart with different blocks to change the biome.