I have an old Xios DS that is running kodi (linux) and its pretty slick albeit a bit slow. I am looking at this as a replacement. One thing it does very well is shut down and then come back up where you left off. For example, if you were in the middle of a movie and you simply power off, when you power back on, you are right back at the movie ready to hit play. Any chance that LibreELEC could implement something like this? I'll also say that the Xios boots in about 10 seconds which I also really enjoy.
Just some ideas.
Good work!