Being able to rotate and/or pull or push holdable blocks farther or closer to you. This can be great for RP purposes, ex: Using a shield to guide a team to infiltrate a building. This can also be great for precision fitting something outside of the editor with another block. I have suggestions how this can be controlled, too. When you hold something then go into ALT mode, you can then rotate it left, right, up, and down with alt pitch and yaw. And for pushing things farther or closer, you can use the scroll wheel to do that. Hope people like this suggestion!