I guess they're kind of good for people that are new/didn't loot. Gold is always useful for crafting items and getting better stuff and removing those quests would make it even harder for people that started playing NI not that long ago. But I agree that it gets annoying when you can't get those kills as easy as others (for example when you're a shielder). My suggestion is making it based on the runs/waves you were a part of on and lower the prize for the quest. No one would get salty about the kills, and you could still get some money for playing. That would also encourage players do do more runs.
Hey ; - )