Today, I think that I have come up with a cool idea to improve Minecraft without adding something that would drastically change the game. My idea is to be able to put a slimeball on the side of a block, and then put a block next to the block with the slimeball to link them together. Now, it would be possible to have a sticky piston retract more than one block and make some really awesome redstone contraptions without the need for a lot of redstone to make a double piston extender or something like that.

Crafting Recipes: None
Images: Will be uploaded soon :)