Create an algorithm for each dungeon, raid or something that needs to have a que, as different characters join. If the same group ques for the same dungeon, the placement of what needs to be done or controlled changes location. Rogue gets in the que, have a door that need to be picked (only to be picked be a rogue) no key from a blacksmith. Possibly there is a trap that may need to be disarmed. Maybe a Hunter gets in the que and has to train an extra pet to take at a certain point. Maybe set a trap before pull or it may result in extra damage the party takes. Paladins having to use the sense undead ability. Maybe there is an extra boss to kill that needs to be found. Loose the M+ timer. No more affixes. The rest Mages, Warlocks, Warrior etc… I believe this would create a less run and gun experience.
I agree with “lose the M+ timer” and “no more affixes”.
blanket-generated content affecting the entire dungeon and every mob in it is not as good quality as hand-crafted content tailored for each mob.