Hey! I would really like to know if it's possible to have the normals and smoothing groups preserved instead of having all the faces smoothed? Is that something that would require a core change in the code?

The main reason is that defining hard and soft edges is super easy in Maya (and many other software) but it's a drag in Sketchup. That's because selecting multiple edges, edge loops and edge rings is easy in other apps but in Sketchup is a painstaking edge by edge process.

Great plugin btw! Works great otherwise!