Pain point:
Most architecture firms use Bluebeam for managing and marking up changes ("redmarks") for in-progress drawing sets. When the set is updated, though, it is a problem: So, you can either manually transfer the markups, or you can go through a transfer process which requires there to be the same number of sheets, which few people seem to know how to do. This is slow and wasteful and if improved could save a lot of time for teams.
The suggestion:
When exporting to PDF, allow revit to preserve the existing PDF / Bluebeam markups. This could be a checkbox in export dialog: 'Smart Import Bluebeam Markups', and selecting a target .PDF file.
When exporting to PDF, if a sheet is not present, ask what to do: skip it and go to the next one or just overwrite sequentially by sheet (ie the way it is now).
