There is a very small population base in Ireland, - even the recent growth in Chinese and Phillipino workers here would be very thin pickings for any direct service from Dublin, to anywhere in Asia.
If the service is daily, capacity is too great. Likewise problems with crew overnights arise if the service is not daily.
And of course it is only 1hour 30 minutes to AMS
, where where are many connections, and airlines keen to get traffic.
There is also LHR
, which sometimes you have to use also - but best avoided.
Good reasons why if EI
have any sense they will stay away from KUL
(and also that Malaysia would kill them on service standards)