I was thinking about this the other day. With heroic scenarios turning out to be relatively successful, the 5 man role based dungeon model seems to be turning obsolete. With role-free scenarios, players are forced to learn a little bit more about their class than just tunnel, and the content itself seems to be more entertaining. Dungeons are entirely irrelevant at max level in MoP. While they will probably still exist during the leveling process, do you think max level 5 mans should continue to exist in the game? I don't think so because they take away development time from better content and they are pretty much useles after the first tier of content.