I think for some reason, I have interpreted "hub and spoke" to refer to a system where each spoke is interconnected in a mostly circular shape. Like the hub and spokes on a wagon wheel. Magic Kingdom has always been used as the example for hub and spoke design in conversations that I've seen, and so the two shapes became linked in my head completely.
I do find it interesting that a park as expansive as Epic would be built in a way that resembles a pre-interconnected Disneyland at all. Epic is a hub-and-spoke, but based on it's development history, you could also say it's four Diagon Alley's attached to a Citywalk in the shape of Main Street U.S.A. It takes a shape which, to my mind at least, doesn't have a contemporary match.
There are people who's job it was and still is to make sure that this park layout works, so I'm sure all of my concerns about the layout have been brought up before, but I'd love to hear those reasons. To my layman perspective, I feel like there are some limitations and possible crowd control issues that could arive from the kind of design that Epic utilizes. I already have issues with the amount of backtracking required to explore Epic, and so when I'm looking at the blue sky dreaming of concepts like this...
I can only think of how much worse it could become. Obviously this art is way more expansive than we'll probably see the park ever actually become, but making that trek between DK to Hiccup's in the existing park is already kinda rough. Any hypothetical expansions that broaden the width of the park further only compound that problem in my mind.
It seems like Great Britain is taking a much more usual IoA-style to it's park design. I suppose it's just an open-ended question as to how Epic will grow, if it'll follow a similar path to Disneyland and connect in some way eventually or if any other park will look like it again. Obviously none of us have those answers, but I find the questions and the discussions that spawn from them interesting still.