It's been said before that flights from SUB were declustered from the 6 a.m. departure peak, so that everybody had a chance to get the airplane into the air in time and not screw up the day's schedule from the beginning with an hour start-up delay.
There is much too much emphasis on this early departure and Sunday's not allowed stuff. It is just political and journo bs*** but is totally irrelevant to the cause of the accident.