Just dropping in to say thanks for the effort and for sharing! I've tried to run it and see how far I get. It looks tantalizing and I would love to use it! However, after a few reboots it started to freeze a lot, sometimes didn't acquire a wlan connection, etc. It keeps asking me on start up how I want to mount a USB device (seems to be the mini SD on which it is installed), and sometimes I don't even get past that question. Perhaps I could reset everything, but it doesn't feel very resilient, unfortunately.
I have used it with a wireless airmouse/keyboad combo. Works a treat and doesn't seem to cause additional slowness, but perhaps the instability is caused by the issue you mention.
I didn't get the tv remote to be picked up with hdmi-cec. That would be nifty.
I have a Tinkerboard S
Thanks again. I understand that you don't want to spend more time on this niche project. Just wanted to raise my hand an say I am actually interested.