Originally Posted by
Cilia
If the logic we're given in 2.0 still holds true then yes, return to the Lifestream does undo tempering. (Ascians' corporeal forms can be repeatedly killed to no end due to their ability to cheat death.)
If we're to take Emet-Selch's account at face value, summoning Zodiark was a grim necessity to stop the Final Days. Summoning Hydaelyn was never a necessity, but a world where life exists as nothing more than livestock to feed a false deity in exchange for "miracles" has so many problems it's unreal. Third options are nice to have or try to make, but due to time constraints or unwillingness to compromise, sometimes there aren't any to be had.
We don't really know what Azem did in response to the summons. Something to keep in mind however is that we are not Azem: we are our own person, even if we have similar tendencies and possess (most of) Azem's soul. Further Azem's defining characteristic was aligning with anyone and everyone to do good; while s/he may not have condoned the summons of Zodiark and Hydaelyn, if their goals aligned there would be no reason not to work with them.