Auto fail I hope for the love of god doesn't get implemented but Bungie seem fixated on 6 players, no more, no less at all times for Raids. If you're even playing in a party of 6 in a Raid started at 6pm let's say and it's going on 9.30pm and it still hasn't ended but you or one of your team needs to get the dinner in the oven, put the kids to bed, phone goes off, an emergency, pick up the wife from work etc..you all end up losing over 3 hours of effort because of natural life occurrences. With no matchmaking; you can't get someone to hop in if such a thing materialises for the final hour+ and by the sounds of it; you can't even invite someone to join mid-game just to cover the person(s) who have unfortunately had to drop out because of certain circumstances. Also if you're playing with a buddy from the other side of the world and someone loses connection; game over too?
Firefights on Halo were fine as you could play 1-4 players at any time and players could join via matchmaking but leave of their own accord if they had to opt out and could be replaced by someone else through invite, join or common matchmaking. With Raids being fixed at six and in Bungie's words; an essential and conditional number to play the mode; it seems the flexibility isn't there and they have made a catastrophic error of judgement on players habits, health and availability.
Even with Raids planned out to the precise second; you always have to prepare for the unexpected in life and may have to remove yourself from the game but I hope that everyone else doesn't have to suffer hours of lost gameplay because of Bungie's strict and ignorant approach. Raids seem overly ambitious but Bungie haven't considered a host of factors that could impact the experience.