Allow blocks to occupy the same space
I really wish we that some of the blocks were allowed to occupy the same space. The collision of blocks was reviewed so that they can move past each other, but you still can't build 2 triangles next to each other. There's a number of blocks which only occupy a very small portion of the space, such as walkways, lights, control panels... Allowing theses blocks to be built in the same space would not have much impact on the balance of the game, but it would give builders more options.