If you believe that he has done what is in his capacity to do, how could it possibly be his responsibility to do more?
Derek has been claiming that it is not his responsibility to force them to get their ducks in a huddle earlier. He's not saying he's not responsible for talking to them, asking them to hurry up even. He is responsible for doing what is in his power. You agree he has done that. So what is, as the other poster said, 'on Gencon' about this?
Look, let's be constructive. If you want Pastimes to get their act together, then you go contact other large MtG organizers from other conventions and ask them to look into Gencon. Who are Pastimes's competitors? Send them some queries, and then, importantly, *tell Pastimes* that you have done this. Make it important to them.
If you complain here, but then drop just as much money on their events year after year, regardless of when they get their events in, they have *zero* motivation to improve. If their events sell well, then Gencon has little motivation as well.
So go do something. Find competition for them, hit them in the pocketbook. Don't treat them like a bunch of friendly gamers who are running things because they love gaming. For a large group running MtG tournaments of this scale, they are in it for money. Don't buy tickets, boycott. Or buy from someone else. And in this case, that means working to bring in someone else. If it matter enough to you, go do it.
Edit: I've never even played MtG, not even once, but a five minute Google turned up StarCityGames, Legion, Cascade, and PES as possible premier tournament organizers to contact.