Ok, my Nexus Player arrived.
I immediately unlocked the bootloader and flashed this ROM.
I use a K400 keyboard that works fine in TWRP and of course in this ROM, but I've to remap the right button making It as "Back" button.
I have an overscan problem about 1 inch, I fixed It with UI Tuner (40,20,40,20) but when I use Youtube, main app fits well but when I start a video I have black borders... youtube works @ 1080p.
Then I have softkeys problem that they does not hide when using Netflix (leanback). I will remove editing build.prop
Nexus Player goes in black screen stand-by after a few, so I unlocked developer menu and checked "Stay Awake".
Netflix for Android Tv (leanback) does works @ 1080p (I took it from apkmirror)
Netflix from market (standard) does works @ SD resolution
I will hard test the Rom in next days and I will try to help you and Zulu, if He wants...