Recently I had built a 2 story storage room and realized its much harder to place the plots for the storage areas than I had initially anticipated, this is because in the buildings mode it does not give you an option to select a floor to view. The sims games do this so you can see what floor your sim is on etc, stonehearth needs this and should have added this when the ability to make multiple floors was added to buildings.
The see tru wall features is pretty bad and completely kills performance.
I think it would be nice if you could do the terrain slice one level at a time so you dont really need the see tru walls.
You would just find the level needed to view inside a particular house. (given that the slice view would work for houses)