In one of Destiny’s recent updates it was announced that Bungie is considering making matchmaking for raids. At the moment it is very difficult to implement matchmaking into the game but they are working on it. At the moment the only raid is the vault of glass. If matchmaking were to be added there would be alot more players allowed to join in. However the game may not fit with matchmaking Bungie said as it is not what they had in there minds. One of the devs explained this “The Raids were designed for solid teams of killers who have made a commitment to solve a dense and explosive riddle. Most of the raiding parties who have emerged victorious from the Vault of Glass have sworn that one weak link would have doomed their chain. There have been other stories, of course. We’ve heard tell of Guardians who met each other just outside the door that leads into that vault. Strange tales have reached our ears – tales of total strangers who have banded together to see the Raid all the way through to a triumphant finale. Those stories surprise us, but the players of our games always have. The best I can do to answer your question is to let you know that you’ve been heard. We’re having conversations about how Matchmaking might support the more challenging activities in Destiny. It’s a start. Keep sounding off about it, and maybe someday some matchmade fireteam mates will hear you, too.”
At the moment the raid system is excellent because you can be thrown into amazing fights and form alliances with people you have never met before.