The awesome @chewitt has updated the Slice 8.0.2 release and the audio and LEDs work as they should.
just downloaded via the GUI available updates. It is the 8.0.2 update which works now. It does not give a different version, just update to 8.0.2 and your audio and LEDs should be back to normal. Mine works fine.
PS FiveNinjas, chewiit is after a slice lite kit to replace his dead hardware, I vote he should have one as he provides awesome support for the Slice Libreelec build. I hope y'all can see your way to giving him one.
PPS the link to chewett's build at http://chewitt.libreelec.tv/slice/ is now dead, see post no 6 at https://forum.libreelec.tv/thread/8688-slice-audio-no-output-3-5mm-analog-or-optical-8-0-2-release/?postID=51271#post51286