Hi,
I try to work with sweethome3D, and I think the staircase in 2D view doesn't looks like staircase and make no sense. I found out a lot of people failed to see it as stair.
Here is an example :
I think it will be better if staircase looks like this
It will help a lot of people to understand our draw a lot easier.
That's my two cents. Thanks a lot.