SVG export works the same way in Standard and Business.
Thank you for the files and videos, it helps a lot. I checked your issues:
Illustrator assumes that the SVG px is defined with 72dpi, but we use 96dpi, as it is the standard for laser cutters and Inkspace. That’s why you experience the scaling (96/72 = 1.3333). We will figure out something to improve this, but until that, downscaling in Illustrator to 75% is the only workaround.
The outer rectangle is indeed the SVG bounding box. It is the clipping rectangle, and should not be imported as sketches. It seems correct in other apps.
Paths: yes, the sketches are independent, and did not form a path. With the polyline option, it does. We will improve this, and the polyline curve resolution, too.