One: most of the reason the GCC has been so popular is because it's the weekend before the Memorial and is more or less on the way for many of the players.
Two: there used to always be close to a week in between.
Three: the Memorial TD probably doesn't care if his schedule changes impact someone else's event
All understandable. But there should be some coordination of the tournament schedule. At least as long we can't just from 5 major tournaments every week.