On 8.0.1 Slice3 release audio from the 3.5 mm jack works fine. On release 8.0.2 there are only three options for sound, no way to select the 3.5 mm outputs. as per the audio options setting page named for the release in the attched screen grabs. The left one is from 8.0.1 and the right hand one is from 8.0.2
Also mentioned over at the Slice forum here
EDIT: here is a link reporting LEDs not working on Slice I recall both the audio and LED issues when beta testing an earlier release of Libreelect for Slice.