"Link to document" button in project warehouse
Instead of just the upload document button, there should be a way to link to a document that already exists in project warehouse via a “link to document” button. It should be able to span across all projects as well, not just within a single project.
I can see how there could be issues then if someone tries to delete the original document, but this could be solved by having all documents stored independently of projects, and then document attributes would be assigned denoting which project(s) the document belongs to.
Perhaps a major architectural revision of how project warehouse manages objects?