Just because a route exists does not mean it will be used, especially if it is made inconvenient. As someone who has walked over to Denny’s with others I did not know making a similar trip I find it hard to believe this was some bizarre anomaly.
But again going back to a point already well laid out by
@FerretAfros, getting into the tit-for-tat of prioritizing this business versus that business is not conducive to developing good design. Urban design is is about the bigger picture, it needs to be able to accommodate a variety of different and changing users. It shouldn’t be about supporting this business or that business, but providing a desirable space for its primary users. That is the real question, should this space support the longer stay tourists, the day tripper or those driving through? The Resort District is actually not that unique in terms of bigger ideas as those same groups of locals, commuters and through traffic are the same different users of all urban spaces. The order of priority given to those groups changes the appropriateness of a design response. Too often this is viewed as a zero sum game where one group must prevail over the others. That is very often the case when commuters or through traffic is prioritized but when placed in the order of locals first, commuters second and through traffic third you can create vibrant, desirable places that work well for all users. Sure, you’re not going to get the the through traffic traveling at 70 mph but in an urban context that was never going to happen no matter how many extra wide lanes you add to the roads.
Some aspects of urban design are counter intuitive (eg. slowing down can be faster) but we’ve also spent the past 70 years stuck in a backwards mindset of prioritizing commuters and through traffic at the expense of the people who actually inhabit and use places. Even the suburbs became more inconvenient and dangerous because they prioritize reverse commuters (people leaving for the day) and their travel through the neighborhood. The quintessential suburb with tree and sidewalk lined streets, porches, and kids playing in the street gave way to the removal of the trees and sidewalks and bigger front lawns so that drivers could see more, resulting in faster and more reckless driving through residential areas.
An Eastern Gateway that provides more parking, expansion space, updated security and improves the experience of Harbor Blvd is more than possible. Why not seek a design that help Disney and helps the other businesses in the area by providing a more vibrant, desirable experience?