Voted "other"
The most defining and important addition was The Wizarding World of Harry Potter - Hogsmeade in 2010. Up till then Disney decided lock in and blue ocean strategies were the way forward. MagicBands, vacation planning (remember you were supposed to book your counter service meals WEEKS IN ADVANCE?), seeing your name all around the park, customized coupons, etc. Attractions were to be plussed (see: HM) with little new attractions or capacity added.
Then Potter opened and momentum shifted. Disney's parks felt stale and lagged behind the competition for the first time in a decade. While the shift was slow (we're now just seeing the "response") there is no way we'd see many things on that list if it wasn't for Hogsmeade.