You know, Blacknight, it's not the worst for what it is: single frontal flash, group of people maybe five deep. I'm guessing that would not be your gameplan if you were the paid photographer.
ISO 400 and that shutter speed gave you enough ambient exposure of the church surfaces in the background. The roof might have been too high and dark for bounce. A humble umbrella would have been big enough to illuminate more people evenly, even better if you put it on a stand at 45 degrees to get some 3D shadowing. A second one could be put on the other side at half the power again.
I do hope the pro took the families outside for the 'real' shots.
A bit of post brings out some details in the dark suits, etc, anyway: