A big problem with optional matchmaking is that it's easier and people will default to it thinking it's as effective as LFG or the forum to find friends - or the tower for that matter. Ask people for help as the tower you run past them a the time. Or on patrol! My point is players will default to the matchmaking and if it's a bad experience i.e. They have poor teammates or AFKers try will assume it's the game not the matchmaking and the player base will slide off. It's not a solid solution. A solution would be to not be lazy and actually *gasp* make friends! MMOs have long been around before destiny and have given rise to LFG sites that are more detailed and helpful than any matchmaking site. Is it more work for the end user? Of course but that's how you ensure success! Finding like-minded people that are willing to go the next step to get the job done. Good luck and I hope your able to find people to play with.