The common keyboard shortcut for renaming in Windows Explorer, Excel and most other Windows applications is the F2 key. While I recognize that F2 is used for Pan (by some), it is not used in the context of the browser or edit boxes that contain strings.
Support for F2 rename CAN be implemented without having to remove the F2 / Pan definition.
I have been using Inventor for about 14 years and still find myself hitting F2 to rename nodes in the browser.