That, and the fact that the path that connects directly to Fantasyland is poorly located and often closed for parades (honestly, they probably just close it most of the time because that's easier), so most of the time you can only enter and exit the land towards the hub. That's poor design that I'm honestly surprised they didn't think about when they built the park. They should have known better.
I don't know if I really like Discoveryland or not, but it probably is still the most effective Tomorrowland-variant in the world in terms of cohesion. Moreso before Buzz Lightyear and Hyperspace, but what can you do?