Right now, when I insert a CD and have Rhythmbox handle opening it, it is not at all obvious how to get the music from my CD and store it on the computer; the button to do it is just a small icon in the toolbar — and the icon is a completely meaningless graphic depicting a CD, at that. Some possible solutions:

Put the Duplicate CD, Eject and Copy to Library buttons at the bottom of the interface. It is natural, with the current approach, that one would read the list of tracks, maybe fix the album / artist name and then look for the button to copy the contents. Elsewhere in GNOME, this natural order of events is reflected by the interface.

Another, smaller change would be to set appropriate importance for the relevant toolbar action items. Right now only Play has is_important set to True so that its text is visible in text-beside-icons mode (which is now the default toolbar style). The "Copy tracks to library" toolbar item, on the other hand, simply has no text in this mode.