This is pretty trivial, but I thought I would mention it anyway.
I have recently been testing Channels on an Apple TV side by side with one of my Shields. There are a few subtle differences (apart from the newer iOS features) and one I noticed is that on Apple if you press the up button to display the timeline it automatically times out after a few seconds. This is a handy feature for a quick check on program info etc.
On the Android version on the Shield though it stays up indefinitely unless you hit the up button again. This in itself is slightly counter-intuitive anyway as I would expect to have to hit the back button as you do to dismiss the dropdown quick guide menu. But if you hit back with the timeline up it just goes back one level in the menu system.
I appreciate that another button press is hardly onerous, but as I understand the apps are meant to be as constant across platforms as possible, I wondered if maybe it just got missed in the Android version and could easily be added?