Slight edits needed to make this compatible with the pre-patch:
Edit calls to UnitBuff to account for removal of the rank - moving most variables one to the left.
Edit calls to the chat-addon calls (registeraddonprefix etc) and prefix them with C_CHAT_INFO.

it then works!

LibGroupInSpecT-1.1 txt
Core.lua.txt

Hello @disc0infern0 ,
I applied your fix, it seems to work.
I'll update asap the addons with BFA's changes.
Cheers

Hey, thanks :) I did find however a couple of further bugs/

1. the UnitPower call needed to be used instead of UnitMana
2. the combat log wasn't being parsed correctly - the new 8.0 call doesn't pass back event as the first parameter, and so taunt warnings were not working. Fix attached.

Core.lua.txt