OK, so they had the canary. Received the warrant. Removed the canary...and re-engineered iOS 8 so that they are no longer technically able to comply with the warrant?
Could you be more precise? Reengineered what? iCloud mail, CalDAV, and WebDAV are not encrypted. So, I guess you are referring to iCloud backups? Did anyone repeat the mud puddle test with iOS 8?
If you are referring to actually remotely retrieving information from a device: they could still fulfil request by pushing the targeted user a signed application update with a trojan.
As someone said in one of the other Apple PR topics: it's as much a political problem as a technical problem. Since Apple, Google, and Microsoft are able to push any update to devices, they can always be forced to put backdoors on devices.
