Solo ops is looking interesting, after reading through the Dev post the plans for enemy spawns and dynamics makes it sound exactly like Warhammer: Space marine 2, all they need to do now is announce unique faction units that can grab or suppress you, or change current ones to fit those rolls.
As for Dungeon matchmaking, it wouldn't work for many reasons. Key ones being if I'm looking to get a specific drop and just want to do the first encounter for it and load in joining a group on the second encounter I'm just leaving, or if I load in and complete the first I'm just leaving that too. Not to mention loading into a dungeon with people who don't want to communicate and have no clue on what they're doing.
Dungeons don’t need to be that crazy though.
I’ve done raids like VoG and Crota dozens of times all without a mic.
Bungie just makes these activities purposefully too difficult cause the streamers and their fake “World’s First E Sports” nonsense. That frankly stopped being interesting like 6 years ago.
Look at Exotic missions. They are just shorter dungeons. Either Bungie needs to add matchmaking to Exotic missions or make Dungeons with matchmaking in mind.