I updated my 16 Sport Sync 3 from 1.0 to 2.2 yesterday via flash drive and I worked flawlessly. I also ordered the USB hub from Walt Sweeney and it will be arriving tomorrow along with some plastic pry tools from Amazon. I've watched a few videos and the install doesn't look too bad at all. Originally I thought I could just pry the USB hub itself without touching anything else (hence the pry tools) but that's not the case. Have to remove side panel and get at it from inside & behind. Still looks pretty easy. I'll update on the install with pics when I get the part.
2.2 seems better and I like the few small additions to the UI.