I arrive in MNL in 2003 and left in mid 2006. During this period of three and a half year it opened or nearly opened many a times. Some airlines were also alloted space and made arrangements to design their offices. But nothing happened. I also remember before a soft opening with 5J, they put up a sham of roof collapse and deferred the opening.
Of course,
PR has no reason to move from Centennial to T3 - what could motivate them to move from fully dedicated terminal to share their space with others.
NAIA3 is doomed to stay closed