True, but iOS does have an option to wipe the phone after 10 unsuccessful PIN attempts. Given that iCloud backup is pretty simple to setup, there's no reason not to configure this option, IMO.
Yeah, but the court can still get a warrant for the iCloud data, which I am almost certain isn't store in encrypted form or at least in an encrypted form for which Apple does not have the keys.
You really need to use iTunes and an app like PhoneView for backing up all your data locally and storing that data in encrypted form outside the jurisdiction of your country.
True, but iOS does have an option to wipe the phone after 10 unsuccessful PIN attempts. Given that iCloud backup is pretty simple to setup, there's no reason not to configure this option, IMO.