Yeah, Epcot and DHS does a great job at promoting their nighttime shows in park with clear and visible signage or showtime announcements. Even though Universal built a proper viewing area for Cinematic, they never "trained" guests to understand that, let alone make them aware as they did a great job at "hiding" the viewing area from the main park pathways.
Epcot announces Luminous 1-hr prior to announcement, letting folks where they can see it and at what time. Put up a sign at each Central Park entrance to let folks know there's a show here later tonight.