My girlfriend and I are taking a week off at the end of this month to start our coop campaign! My only fear is that it feels a bit too mmo as we want to keep to ourselves rather than wait in some dungeon group queues.
Yeah apparently some bosses need a party of several people. I'm trying to avoid spoilers and stuff so I didn't look into it too much so don't take my word for it tbh just something I saw people complain about in the beta threads.
I too was trying to avoid too many spoilers, during the beta I just wanted to get the level 20 cosmetic and then immediately stopped playing once that was achieved. I know they have world bosses that may require a large party but thought those were in the open world and not in a dungeon.