Using Shape Quarry cards, I can remove blocks and place them in storage, and Using shape cards I can add blocks into the world, but blocks will not be replaced. It even looks like this feature was started with the copy option that exists in the top of the builder GUI, But I cannot find a shape card that allows me to unlock it. It's annoying to have to go replace all the sand and post lava cobble with a second pass when I could build->replace all the blocks I want and tidy up whatever else is sticking out later.