To me, gameplay is key of course, but second to that, it is the story that matters to me. But in this game it is pretty much impossible to experience the story in dungeons because people keep skipping everything. It is very annoying and game breaking to me. sometimes I can listen to the dialogue and let the group go ahead, but that makes me feel like an annoying player who keeps the group waiting. But sometimes I can't even get the dialogue because players skip through it and just starts some event. There should be some kind of ready check before this can be done.
I hate to bring up another game, but SWTOR actually made this work with their group dialogue system. You could not skip stuff if not everyone agreed to it, it may sound selfish, but I am in this mostly for story so this kind of breaks dungeons for me.
I wish they made a solo version of all dungeons that has worse loot but is doable without a group so I can experience the story. Or just make dungeons without story, because it never works well with other people.