I think the shutter is deserving of a tooltip as a way to put new players at ease when they notice a construction project appears to be going awry.
And since we haven't got the option yet to shut the shutters, it also would be a great opportunity to clarify whether a shutter has any impact on a building's heat insulation or weatherproofness.
.SHUTTER.WALL WITH A SHUTTER.
The shutter is a window feature set into a wooden wall. It provides a view of what lies beyond the other side of the wall. In addition, thrown weapons may pass through the opening.
A shutter under construction will dynamically align with adjacent completed walls and interior flooring once this tile is fully built.