I've been playing with randoms on everything i do since house of wolves released and i haven't had a single problem with one person yet. Don't make it like matchmaking brings out all the random goobers and shit players. I myself don't like to run with the same group everyday because its way more fun to meet new people and enjoy gaming with everyone. The players i've been meeting on the bungie app or matchmaking have been ten times better than the clan/group i used to run with. Plus now i can do things on my time instead of trying to make sure i'm on the same time as my other clan/group members. Matchmaking is a must in my opinion before i purchase anymore Destiny content.

That's why it's optional. There's no loss. If you don't like randoms , go solo. If you hate solo , find friends. LFG , in game "social". No pain from what's already dead.