Why does The Wizarding World of Harry Potter, undoubtedly the most popular section of Islands of Adventure, occupy the smallest area? The line for Harry Potter and the Forbidden Journey is continously being lengthened, spilling over into Jurassic Park. Ollivander's Wand Shop has a waiting list. Even the carts offering Butterbeer stretch half the length of Hogsmeade!
According to The Unofficial Guide to Walt Disney World, which also extensively covers the Universal parks, this owes to J.K. Rowling and company's desire for the area to look as close to its film counterpart as possible, with realistic proportions. Size had to be sacrificed for authenticity, and that means crowd issues.
I don't know if this is true of Universal Orlando, but there isn't a single attraction in Universal Hollywood that doesn't spit water on you. Why do they do that? Does Universal assume spit = fun?
It's a cheap method of adding an "interactive" portion to the ride and getting a cheap shock out of the guests by spraying cold water on them.