Well, I've been telling Bungie since D1 that they need Raid training simulations with NPC fireteam members who teach newbies the basics of the Raids, what you need to do, best strats for dealing with each part, as well as optional matchmaking for people who want to practice with real players once they get the hang of playing the various roles in Raids. Hell, just add optional matchmaking to actual Raids too... with fireteam settings where you can opt not to matchmake with people who haven't gone through the Raid training sims first.