one problem with ‘queued’ dungeons is that people have different goals. Some want a guaranteed steamroll for fast xp/loot, others are content to play it through and try their hand.
The first group will insta-leave if they don’t like what they see they’ve been queue’d with.
When this happens I’d really like to see it just pull somebody else in queue that could fulfil the missing roll and spawn them into the instance somehow.
This might not be possible because of the way dungeons work (ie you spawn an instance with your group)… but it would be a huge improvement