I think this feature will be great for new players. I remember as a newbie I have great problem with finding Questmasters and even now sometimes is hard for me. Fortunately thanks to hints it began a bit easier, cuz you know where to search

However I was thinking about one more feature - marking QM with (?) in description. That will say to you that here, this man/woman is QM and have quest for you. When we take it this sign is changing to (!) and when you done all quests from him no mark will appear.
That will be very helpful for example with Gunthar (right? the one in VK) or with Tarshir when he has quest for you, but his reply is not so clear to understand it to back later.
What do you think?
IMO for wizards it wont be hard to create, but very helpful to all players.