Can I suggest some improvement to viewing of the 3D results
Option for walls to dynamically disappear. For small rooms it is hard to get a good sense of the room either with a virtual visit or the aerial view. The aerial view can see in and the virtual visit is too close. I've used another tool where as you spin around the room in 3D the nearest wall disappears allowing you to look into the room. This gives a better sense of the room than the modes currently available in Sweet Home 3D so I'd like to suggest it as an addition. Note I do know you can make all walls disappear but it is a better result if the rear walls stay solid.
Similarly I find that in aerial mode the pivot point in not always ideal so I'd like the option to set this on the 2D plan (or in the 3D view). This would enable looking at just one room of a house, circling round it, or just looking at the home in house + garden project, or just the garden.
Isn't it always the way, even though you look before, it is the moment you post a suggestion you find that feature already exists, but it just hidden.
Suggestion 2, fixing a point for aerial mode is already in preferences, "aerial mode centre on selection" and just needs to be ticked to enable it.