Disneyland had that once, with the old northeast quadrant that included the Submarine Voyage, Monorail, Skyway, two separate Autopias, and the Motor Boat Cruise all intermingling over, under, and around one another. Sadly it's been chipped away through the years leaving us with just the Monorail (with 3 trains instead of 4), a single oversized Autopia, and the Subs with a slower-than-ever loading process
Similarly, throughout the park Disney has removed smaller things that once helped soak up crowds. Things like the Keel Boats, America Sings, Mission to Mars, Big Thunder Ranch, and countless small-scale attractions in Toontown have all been removed without ever being replaced in a meaningful way to the park's operational capacity. Disneyland has always thrived on its depth of smaller attractions to help fill out the day, but they've slowly been chipped away through the years. In isolation, no one of these losses is a dealbreaker, but in combination with one another they've made a big dent in the park's operational capacity
Similarly, that's why I find the Star Wars project so frustrating. Instead of having a variety of attractions of different scales to absorb crowds, we're getting 2 mega-attractions and vague promises of interactivity (that will surely only last a year or two after opening, once they realize the huge cost of one-on-one interactions and how much they clog the walkways). Regardless of personal preferences on theme, the planning-level decisions for this expansion are poor, and only act to reinforce the questionable path the park has been on for the last 2+ decades