I made a diagram to illustrate my point.
I don't know if you are being serious or not, but in case you are, I have to point out that that is the map of US, not the world. If our goal was to make sure that all US players will able able to join tournaments at times that are perfect for them, then I would agree with the picture. But the problem is that more than half the players come from somewhere else. "Eastern" does not mean Eastern US.
I talked to TO's a bit about the possibility of merging the two tournaments into one bigger tournament, and then rotating the time of that tournament, for example 8 different time slots during the whole 24 hours (with possibly skipping the most inactive ones around 11GMT). This would have many benefits and would guarantee that everyone gets a chance to join at some point.
I'm not much of a tournament player, but... If you do that, while it ensures that everybody will be able to partecipate in tournaments some time or the other, it also ensures that everybody will NOT be able to partecipate at least one or two times each rotation, probably more. With two tournaments, you have that most people can partecipate in one, some in both, some in neither. Wouldn't have two tournaments with the same "rotation" be better? I.e. having two tournaments as usual, but shifting the time by, say, about 8 hours every week. That way you have one tournament every 8 hours within two weeks.
The point here is that while you still grant one tournament each 8 hours, you also grant most players the chance to partecipate every week instead of every other week. Not sure if I made myself clear here.