This sounds like a good idea. I'll pass it along to Code and see how feasible it is. The biggest obstacle may be how much increased server processing it would take to check everyone's lower level quests in the zone.
It would definitely have to default to off, but could be something that could be turned on if the player wanted it see gray quests.
LINK
(Jindrack) Re:How many player want to show feather mark on NPC at grey quest ?
