I find myself often helping friends complete quests that I am not currently on. It would be very helpful for me to add their quests icons to my map. This would greatly increase questing efficiency when players are needing to catch up on each other's quests.

I understand this could make the map a little confusing, but perhaps adding color coding or some other indicator to the icons will help differentiate between others' quests and your own.

I have asked others in game and they all seem to agree this would be a great feature.