So, a model apparently needs consistent smoothing settings (either on or off, I remember having issues with the compiled model, if this is not the case anymore or I happen to have messed up somewhere else please let me know) to be properly exported. However sometimes, for example if you want to bake AO, smoothing settings have to be different throughout the mesh. The current solution to have this and exports working, is to create a duplicate of the final object, apply specific smoothing-settings there, and bake AO with this, while exporting the original model.
It would be nice if the export script could make this step obsolete, allowing you to pick whether or not the object will be smoothed during export, without affecting the smoothing settings of the model in blender.

Thanks for reading this and thank you for giving us the opportunity to create great content for source games using blender.