The first night will be busy because the opening day of anything is busy. Vloggers gotta vlog.
HEA is "packed" because you have 10,000 people crammed into the hub and Main Street, the only place you can watch the stupid thing. Fantasmic returned to huge crowds because DHS had NOTHING else at night. How well have those Luminous crowds held up, by the way? I could have watched the show from a dozen front row spots in September, and that was just between France and Italy. No hurricanes or anything preventing people from being there.