I use the Bluebeam plugin to make PDF's out of Revit. I love that it makes viewports for every view set to the right scale for measuring later. Unfortunately, the Bluebeam plugin scales the print just off by about 1/8", and CAD-based logos get segmented poorly. I'd love to have the native PDF export include this feature since it does a better job--especially with the CAD logo segmentation. This would come with the added benefit of integration to Revit's Sets. Bluebeam can also manage sheet sets, but it is separate from Revit's. Please make viewports a native export option!