Hi Pascal,
Most important would be to be able to turn on curvature graph for only one or more isocurves and set the scale per isocurve. That would be a big improvement and not to hard to implement I think.
Then real time sections in each plan view would also be excellent. Not necessarily physical sections, but only the display of lines along the object (that can be baked with a certain tolerance if desired). The current section tools are very limited compared to existing Orca3d sections. To my opinion proper section analysis should be basic Rhino functionality and not plugin functionality.
Thanks