TNT defenitly is not unnecessary. It's the first item that comes into your mind when you hear the word grief.
Wether you like griefing or not, this item is very important to many minecraft players.
Lanterns are nice to look at and you can attach them under a block.
Rotten Flesh can safe your life. The poisonous potato would have been a better example.
Heart of the sea is uneccesary? Why is that? Was the Aquatic update unecessary too? Why isn't the beacon uneccessary?
Sponge I agree. But only becouse i don't like to use them. On larger scales redstone machines are the better choice.
Nah i love sponges for getting rid of water where i dont want it to be at like huge lakes n such