If I could implement anything into minecraft it would be additional redstone features. One of the ones that would be the most important to me is Redstone Delayers, redstone delayers would do the same thing as repeaters but when right-clicked, a GUI pops up that allows you to set how long it delays the redstone current. Currently to delay a redstone current for even 10 seconds it would take almost 30 repeaters. Whereas with this new addition it would only take 1 Delayer to delay redstone for 10 seconds or 1 minute, even a day! Another cool feature would be wire. It can be suspended in mid-air instead of having to be on a block. One last thing I would add (although I don't have a picture) would be vertical redstone. It would be a great time to implement these things since the "redstone update" is coming soon.