So long as they make matchmaking [b]optional[/b] (unlike what they have just done with the weekly heroic), then I have no problem with it. If it's optional for raids, then Fireteams can play it together as they currently do. And those who wish to raid using MM with all the inherent issues people mention, can do. But it has to be [b]optional[/b], and not [b]mandatory[/b].