Doesn't take an expert to figure out why...either come in the summer and endure a heat index of >100, pay the premium summer tiered pricing, and enjoy no special event offerings, or come in the fall and enjoy a heat index of <90, pay (somewhat more) reasonably-tiered pricing, and enjoy special event offerings (F&W). Epcot is my favorite park when there's a festival going on, but when there isn't, it might be my least favorite.