As someone who just helped my elderly parents switch from cable boxes to Apple TV, here are my two biggest gripes for Apple about this device:
1 - It is RIDICULOUS that the TV button on the remote defaults to the tv app. It should absolutely default to the Home screen (you should change this in settings>remotes).
My mantra for them is: "whenever you get confused, hit the TV button and it will take you back to the home screen."

