Description - Copy Project does not copy cross-project predecessors as one would expect when copying predecessors. To not copy cross-project predecessors mean manually having to re-associate tasks. That means having to manually compare projects, use the inefficient task selection dialog for predecessors (project/task filtering by name isn't good enough to actually find specific projects or tasks), and confirm that everything in the project is set up properly.
Why is this feature important to you - Copy Project is incomplete if it does not copy all attributes of the source project.
How would you like the feature to work - Copy Project must provide a way to copy all attributes including cross-project predecessors if it's going to be a full copy.
Current Behaviour - Copy Project ignores cross-project predecessors