I'm still on 2.11 and still lovin' it! I heard the key issues were result of interference from the Sirius weather app, so never renewed Sirius and issues gone. Of course I still get the occasional reboot too, but that's Sync for ya.
Still have my album art and wallpaper too!
2012 Silver Ingot Titanium Hatchback
Premium Package, Sport Handling Package 18" wheels
MFT w/Navigation, Parking Assist, Rain-sensing wipers, leather seats