Switch printer on-the-fly
Printing features need essential improvements: ability to change printer on-the-fly (not just printing to default printer), direct print to pdf (similar to Autocad's dwg-to-pdf printer), bulk printing/publishing to multiple formats, exporting to Autocad dwg layout should keep paper size (even custom paper sizes) from Revit, not adapting it to default Autocad paper size.
P.S. And stop creating that .pcp file (for dwg export) that no one uses anymore. At least create a modern .pc3 if such creation is absolutely necessary.