I like the hardware in the shield but Android TV kind of kills it for me. When I was still using my shield, the UI would frequently get updated, and each update made the home screen worse and worse.

I wish they would just copy the Apple TV's home screen. All anyone needs is a grid of icons and NO ADVERTISEMENTS. There is no more room for innovation here. Stop trying to re-invent the wheel. Just admit someone else already perfected it and move on.