Hey guys,
After playing a bit I figured it out... As someone on another thread also mentioned going to the roster will only show the people in your instance (game session), I read that because there is so many people playing the game adds you to a group of players (I think 20 or so) as you enter a new map, not sure how they decide on the grouping but I think location and level plays a roll...
I have realized that 'friends' play a big roll in destiny, because there is no in-game recruiting you have to do it via third party apps like Facebook to form groups or destinylfg.net for fireteams and events recruiting... Would have loved a in-game recruiting system like WarFrame, but I presume I'm not the only one
Also the mic thing is a bit different, first game I had to use a mic to communicate to players... I play games to not talk to people and now I have to talk to people while playing, different... but I'll live...
Anyway, talk to you in the game