I upgraded a few weeks ago to LiberElec version 8.2 (generic AMD/Intel processor). After getting past the SAMBA configuration stuff. I thought I had a fully working system. Although almost everything works, I noticed that the PS Vue addon will not play back correctly. Something the video playback will work but after a few minutes, the playback gets extremely laggy and unwatchable. Sometime restarting the app will restore good playback but only for a few minutes.
I thought it might be a Kodi issue at first but as a test, I reverted back to LibreElec 7.9.5 and playback seems to be good. I uploaded a log file to pastebin and added a link to the PSVue thread on the Kodi forum. I would be glad to provide more information to help troubleshoo.
Meanwhile I will stay at version 7.9.5
I wish everyone the best during this holiday season.