Sure, the Magic Kingdom is about bringing out the
adult in us.
Right or wrong, one of the most commonly expressed concerns with the Main Street USA Starbuck's was that the cinnamon rolls would no longer be available at that location. I recall reading posts to that effect on pretty much every website. There even were posts on the highly censored official Disney blog.
There's a big difference between having cinnamon rolls available at the front of the park vs. the back of the park. Gaston's Tavern is about as far as you can get from the entrance. Guests seemed to view having cinnamon rolls on Main Street USA as a tradition.
WDW advertises nostalgia and tradition. ("Come back and relive your childhood vacation with your children.") It just seems incredible to me that a place that built itself on guest service, that sells nostalgia, would break a tradition that many deeply care about.