Don't mean to sound awful, but the idea of a matchmaking raid does not appeal to me at all, the commitment required, in both skill and time for newer raiders may not work in that sort of setup, I can sort of see people abusing it too, the same way they currently do with strikes (yep i'm just going to hide somewhere safe and let you do the work).
I'd like to be proven wrong, so more people get to play through the raid, but for it to truly work they need to iron out the bugs raid currently has otherwise it could just end up a frustration fest
they just need to have a way to vote someone off or something of that nature. there are tons of mmo's out there already (WoW) that have a type of matchmaking system up that works pretty well.
but I agree with the people hiding somewhere. had a guy literally do nothing the entire strike yet strange coin at the end. nothing big but still annoying given he did absolutely nothing. I tried at least doing that "reporting" thing but that doesn't ever work. so ya...