The main problem about joining EVA or CAL as FO is that I don't see any upgrade chance specially if you are joining the B744 fleet.
At CAL, there haven't any expat upgrade to Captain in the 744 fleet for the last 5 years. Much better chances had the Airbus guys.
So, if I would have to be expat again I will not join any Far East company as an FO unless I don't have any other chance to feed my family.