I have installed the latest nightly on one of my Fire TV’s. It seems to be working well with one small issue. I have a custom key map installed, The keymap maps the up and down ring press to the volume up and down. In the latest Beta 5 nightly the volume is only working on videos, for live TV the up and down ring press are using their default settings and not the setting in the keymap.
Kudos on the organization in the new version. I love it, several bug fixes from 16.1 noticed as well. Nice.
Keymap.
http://pastebin.com/1XLcJeaw