Rotten wood

When u stand on Rottenwood it start's to break and it takes 3 seconds for the wood to break but then u power it with redstone is breakes faster and the stronger the redstone inpute the faster it breakes. They fastest the wood can break is in 1 second. You can also use this for puzzle maps without using commandblocks and do it in survival. There is also many types of wood and also the types from the nether.

You can also use it with tripwires and daylight sensers and you can use them for traps to prank your friend's and steal there stuff if you want. These are the reason's why I think rotten wood should be in the game.