This brings up an interesting point. Since people can still duo DQ on a regular basis why not revisit the original "Dragon Scale" idea when VoN was the only warded chest raid.
In that case it was collect 12 scales and you go get to choose a bound item from the warded chest drops. (ala Invaders tokens) Everyone would have a reason to run the quest multiple times and everyone gets a reward eventually.
- It discourages soloing/douing for anything other than bragging rights.
- It gives casual/unlucky players a more positive outlook on the quest.
- It encourages repetition.
- It encourages people to make larger groups and possibly PuG a raid.