And all of those PF were created by Doom, so the one that was with Cyclops may still have a part on this story...
I agree with you and think that, after Doom starts doubting himself, everything will crumble.
Don't forget, it's a mortal with God powers... He had 8 years to train is powers (more then he had before with the other Beyonder power)... But in the end, all depends on the limitations of his human mind...