All parks have a bus terminal.Epcot has a substantial bus terminal, in addition to the monorail and ground service for a fee. WS has a Skyway and boat service to DHS.
What ground service are you talking about?
And it can hardly be a hub if you need to walk about half a mile through the park to reach the Skyliner. Plus of course have a park hopper ticket, otherwise there would be no point in going to DHS.
Almost no one with any sense would go to the Epcot front entrance to get to DHS:
- if you’re driving, just drive to DHS
- if you’re an onsite guest, take the bus to DHS
- if you’re offsite, go direct to DHS