[Jayhawk]

Is there a simple tutorial explaining how to get the new one to behave in a way to parse this kind of information again?

Such as :

function PetInfoFu:CHAT_MSG_SPELL_AURA_GONE_SELF()
    -- catch the Feed Pet Effect fades
    if string.find(arg1, BS["Feed Pet Effect"]) ~= nil then 
        isFeedingPet = false
    end
    if string.find(arg1, BS["Improved Mend Pet"]) ~= nil  or 
        string.find(arg1, BS["Mend Pet"]) ~= nil then
        if self.petMendFrame ~= nil then 
            self.petMendFrame:Hide()
        end
    end
end

Iriels stuff looks... confusing