It would be nice help the user when a certain workflow is used.
ex.
When I start a new project I copy the mediafiles to a working directory, local drive or server.
Then I start to open a predefined project with al screens set.
Next I save this project to the working directory.
When I now select import I expect Premiere to start opening files in the directory where I just saved the project!
Not my documents etc...!
Same goes with export,
with new projects, choose the project location as first default output directory.