Currently walls have a set height of 6 blocks tall. I suggest the addition of a height slider, much like that of roofs and stairs, to control the height of a wall before setting it, this preventing the need for building additional floors between layers, or expanding walls upwards with individual blocks.
This would be especially useful for a few different things:
-Allows for easier building of towers
-Allows for matching building heights/second floors directly at terrain levels
-Allows taller rooms/buildings without having to resort to slabs, and thus not blocking the view
-Allows larger spacing of floors until a building slice view system is implemented