Re: Wouldn't set a precedent.....
Of course it would set a precedent. Apple have the ability to bypass the security on this version of their phone so it would be a can of worms for them to try to oppose any future court orders regardless of how trivial the alleged case. The thing most people are ignoring is that the newer phones have the secure enclave implemented in hardware so they will no longer (in theory) be able to bypass these security measures. The precedent then becomes moot as it no longer applies.
However the fact that a court order previously could be used get get access to a terrorists phone but on later phones thanks to the secure enclave it can no longer be done will give the government a poster child for implementing back doors.
I's a no win situation: on one hand it promotes a governments ability to spy on its (and other countries) people, but on the other hand it raises public support for a super rich corporation positioning itself above the law.