The newly revamped clan system won't be available till "several days" after launch according to Bungie.
https://www.destructoid.com/destiny-...--459509.phtml
Unlike with the first game Sparrows will be limited to rare status in terms of item drop rates. Official reason related to Bungie wanting players to rush less through the game's content and instead spend more time exploring.
https://www.destructoid.com/the-deci...g-459501.phtml
Japan decided to celebrate the launch of the game via a dancing commercial for the game.