I would like to see the ability to save custom pane arrangements to be used in the "Reset Panes" menu. I love the idea of resetting the panes, but none of the built-in options quite match what I'm working on. I often need access to Manage Records, Tasks, the Python Console, but in different combinations and arrangements, depending on the workflow I'm in.
Being able to add to that list of presets would save me a lot of time, and seems relatively doable, as there are already presets in place.