My update on my ATV380 went fine except I also do not have the new Kodi. I have also found that the screen will go blank/black for a second or two when starting a video or skipping forward or back within XBMC. Not a huge issue, but something that wasn't happening before.
I do find the overall interface and connection smoother/faster.
Can someone explain how I can get Kodi working and still keep everything?