I think some dungeons work pretty well as tutorials. They are faceroll easy and they introduce some baby-level raid mechanics, but the concept is there. If anything, I would borrow more raid mechanics and put them in dungeons like it has been done so far. People stepping into raiding content requires more than education but dedication and preparation. They are expected to AT LEAST know how to play their class and yes, be a fast learner if you are wanting to jump into a group of seasoned raiders. It's hard to motivate people into it.