#1: I would add a multiplayer friending system where you can add friends to a list and it will show if they are online or offline and if they are what they are doing.
#2: Change the music disc "Cat" to the one from the xbox version because it adds the song dog on top of that.
#3: Make Custom Biome Mobs Like Desert lizards or snakes, ocean sharks or fish, or jungle monkeys and Please add Birds!
#4: Make villagers have more purpose like paying them to fight for you or help you mine or something and like have them give the player quests.
#5: Add the friggen Aether for heavens sake!
#6: Make a Caribbean type biome with palm trees and stuff
#7: Add more music!
#8: Add Lamb chops!
#9: Add super rare dragons in the over world
#10: Add more potions and effects
