That's an interesting idea but I don't think that would work well with how the game handles blocks and system resources. I think that would potentially increase the system resources needed to play the game by too much. Of course, I don't know the programming behind a voxel game, so I could be wrong. As it stands, the game has a maximum unique blocks limit and people already reach that limit if they are using some of the mods out there. Whether or not combining blocks into one would be enough to cause issues, I'm not sure. I know I've run into times when I could not get the right block shape for what I needed. One example was when I dug a tunnel badly and had to use angled blocks for the walls because I didn't dig a straight tunnel. It worked fine inside the tunnel but when I tried making an entrance to the tunnel, I found that I couldn't square it off properly with the available block shapes. Almost, but not quite. So I get where you're coming from. I don't expect a change to this, so unless they are adding a shape you need, you're probably better off creating a custom shape and adding it via mod. You can always suggest shapes that you feel are missing and there is a chance they'll add the shape.