After several weeks use of the new dongle just a couple of annoyances to report
1) No way to replicate the Home button using the TV/CEC functionality with the TV remote control so have to do multiple Exit presses to back out of any of the apps.
2) No consistency across the apps about how to control the play bar to Play/Pause/FF/REW/Skip. Do Google have a "Style Guide" for app developers to follow for these versions of the apps to make best use of the buttons available on the dongle's native remote control?