Quest item placement in dungeons

I'm running into the problem of quest items stuck in the walls more and more frequently, requiring an ARK to help locate them.

I make sure that every mission I do counts. If I'm doing a mission, it's because it will reward me with an item I need. I don't have any high level chars to give me items/cash, and I don't have a guild to hand me this stuff. This is the way I earn my wages, and it's a total time waster to have to get an ARK to check into it for me.

Naturally I don't have this problem in team missions, as the quest item is always in the boss room. But the item for solo missions is always placed in a semi-random part of the map. Maybe if they would make a special room containing the item, similar to the boss room. It doesn't have to have a boss, or any mobs, but should have a lift to it or something BIG indicating where it is. I've yet to encounter a lift so hidden that I couldn't find it.

This isn't a fatal bug, but it sure is a time consuming and frustrating problem.