Seems the Store addresses for 1.2 apps are different, hence the restore issue (just a guess). Another possibility is that the Backup doesn't ask for the Nokia account credentials needed.

EDIT: Overall my N950 feels much snappier.

Old SMSes got restored, though I didn't have many to confirm there are all of them.

Even paired Bluetooth devices and wireless connections got restored.

DLNA sharing is available in the status menu along with the bluetooth.

Change mail password from failed transfer is now a normal dialog and can be swiped away to check the pass.

Keyboard install from Mesinput requires restart (dunno if this was the case before).

Clicking on album art now brings up the playlist instead of pausing (music player). Long click on song shows a menu with append to playlist, queue and favorites.

Hmm, managed to freeze the whole phone completely. It restarted after a minute. Dunno how it happened.