Adding a setting to override the rendering mode for exporting is something that we are considering adding in the short term. It would be a document wide setting that allows you to set the rendering mode to raster/vector/hybrid, regardless of what each individual SketchUp model viewport is set to. This would apply for any type of output - printing, pdf, dwg, etc. Note that currently the DWG exporter has an option to export all raster viewports as hybrid; this option would be removed in favor of the new global setting. Does this sound like what you are looking for?
Adam