Dear Jebat,
Let me bring you up to speed; Air Asia looks after their pilots better than MAS. MAS however have wide body aircrafts that Air Asia does not. l do not have a crystal ball to gaze into the future, so l don't know what will happen to Air Asia, but I believe, they have very capable people looking after their turf whereas in MAS there are only asses eating the turf. So, the choice is yours. You can join a winner or you can join a loser depending on your preference.
Regards.