Remember, Apple refused to unlock it because the FBI wanted their capability of doing so be publicly advertised: https://www.reddit.com/r/technology/comments/46k4ke/apple_ha...

There seems to be much more to this beyond the actual capabilty and it doesn't seem the spin 'apple fighting for our rights' which mainstream media loves is the most likely, so I wpuldn't say FBI hasn't accomplished its goal - especially if it was to cast doubt on Apple security, as they're now basically advertised they can do it no matter what. Unless FBI agreed to previous apple request and they did it togheter under cover.