This seems to be a week for updates. A new firmware just rolled out for my Transformer Prime yesterday, that I just installed. Haven't seen a changelog or anything, but most of the discussion in the XDA forum has been about improved (or not) wifi/BT and better (or not) performance. Face unlock has also made it to this version too. There's also a new indicator for when the GPS extension is attached.
Will see how things are over the next few days.