It would be a nightmare. There's already lfg, where u can speak to people & gauge their mindset & level of experience BEFORE you launch the Dungeon. Whatever problems exist in lfg would only be worsened & multiplied by match-making. I've seen ppl complaining on here about toxic or idiotic players they got matched with in STRIKES... can you imagine how much worse Dungeons would be ? Every other post would be about how they got match-made in a Vesper Host with people who dont use any comms, but keep picking up scanner & not calling anything out... how they got matched with someone on Shattered Throne who well-skated thru the map & pulled them before they got to kill the secret bosses for WishEnder quest... how there's not even enough players to match-make a full fireteam for the older dungeons cuz they're "irrelevant" now... how they spent 6 hours on Master Sundered Doctrine cuz some idiot didnt KWTD & kept rearranging all the lamps in the first encounter. I say no to match-making for the same reason I say no to Dungeon encounters in the Portal. Its not a conducive learning environment for ppl who have never done Dungeons before. The added complications & confusion might actually deter noobs from trying any more dungeons.