yes
middle case don't exist in Sketchup (maybe by plugin i must research)
(so it's a retouched image)

for middle case that must say that object must know original position :)
or used another same color (orange) who replace tiny red and tiny green that explain // at a plan X,Y

For hidden lines no problem: use a dashed line with same color than visible lines ;)
visible lines must be not dashed

< if it feels natural or if it feels strange...
just instant view as you toggle in a click :)
Don't know if exist on another prog but I presume :)

But as you said it's helped for box volumes or volumes who have straight edges inside ;)