Ideas

Regarding the virtual tour, do the same as Unreal Engine, a system just for that. Because the way it is, you can't do a cool virtual tour. There is no way to block the flight button, leaving only the walk button.

AutoCAD 2D still serves a critical role in the work of e.g. many Landscape Architects. It's also available in many offices relying on backward compatibility and AutoCAD offers very solid X-Ref and Block-management, which would be interesting to us...