Tokyo DisneySea is the pinnacle of what Walt Disney Imagineering can do in terms of master urban planning, set design and application of layered detailing. However, WED did lay the groundwork and DisneySea is the logical conclusion to what WED set in motion six decades ago.
Although DisneySea is very different from what WED was doing, on something like Main Street, U.S.A., it is perhaps a very evolved version of what they were doing with New Orleans Square. It’s a remarkable culmination of over 40 years of themed entertainment experience. Tokyo's second gate is incredible because one can wander in that park and the vast majority of details feel so purposeful and well considered. This is painstakingly true in American Waterfront. Everything implies some sort of history or purpose and it all works to make the illusion real.
One can find examples of this just on the signage alone found throughout the land.
History and purpose without fan-service baggage. A sign is just a sign, doesn't have to be a reference to something or something else.
With the recent projects, somehow world building became synonymous with easter eggs and references and as a result storytelling in all mediums has been lessened for it. Projects such as the latest Matterhorn incarnation, Mission: Breakout and Pixar Pier all represent this; a regression. Where theming results to IP-based clutter or self-referential, fan-service type nonsense that doesn’t make any sense to the environment or attraction. Details have increasingly become in-jokes, trivia, and references to the past or other parts of the company, rather than elements that add depth and suggest believable histories for these places we know are fake but are paying to be tricked into believing are real. Details at Disney theme parks should sell the illusion, not call attention to the smoke and mirrors.