I like the idea - I worry about the consequences.

CM was a horribly experience as part of my storyline because it was rushed and i was continuesly left behind for watching the cutscenes.
And a post just 2 above this in the dungeons thread (as of writing) is talking about the attitude of lvl 50 players - which I can recognize in the community right now.

So while it may provide some help to these storyline players, and incentives to assist your friends in the lower level dungeons (something the word "friends" should be enough incentive to imho) - I worry that lots more will end up with a bad experience because 3x DF 50'ies are yelling at you for not understanding the mechanics of speedrunning past half the trash.

If community gets fixed - hopefully something like this is more viable.