I don't know if I put it under right topic, but oh well.
Expanded Equipment featuring things as rings, necklace, backpack slot, pockets.
Rings and Necklace could simply work also as new items found in dungeons or they would be craftable. Unique feature of this equipment would be unique enchantments which could grant constant potion effect for owner.
Backpack slot would be slot that allows someone to wear backpack and chestplate at same time and also backpack slot could hold Elytra so player can have chestplate on.
Pockets are more simple and less important. By having same item in your hand and pockets for example dirt, if you would use that dirt for building it would went right in your hand after you will use up all the dirt you had in your hand. Why would this be useful ? It would save some place in toolbar.