There are many things that they could/should add to the command block to make adventure maps, and redstone creations a lot more complex and awesome. But one little feature that should be added is the feature to focus on a specific person. For instances you could do "/say hey @TheDarkerEmerald what is going on" (TheDarkerEmerald is my Minecraft account). This would speak only to that character. This is a small change but does a huge amount of changes. I catch myself making redstone creations where this option would be extremely helpful! PLEASE DO NOT LEAVE HATE COMMENTS, IF YOU DO NOT LIKE THIS IDEA SAY SO IN A NICE WAY!!