2 Things to note:
1- The Camera makes the crowd look a little closer together than it actually is (still bad, but of note).
2- Moving the drop time really wouldn’t help. It would make Rise lose an hour of Operations (even fewer people getting to ride) and there is a weird tendency for people to bunch in Hollywood, Center Stage, and the Sweet Spells corner of sunset for the BG drop. A photo in TSL, GE, the Edge of Sunset, Echo Lake, or Grand Ave at the exact same time would look comparatively empty. This may also be because people think rides don’t actually open until 10, when, for the most park, they (or at least their queues) open with the park.