When making a marker in an instance, such as a dungeon or tower, that's all well and good. I don't expect that when the dungeon passes, that the marker should stay.
But, I'm hoping it could mimic what happens when you disconnect in an instance and reconnect after the instance is reset: you get sent to the entrance.
Why can't this happen for the marker as well? This would help in cases where I have been disconnected due to link death, I end up not having to trek half the way across the spiral to get where I wanted to go. I used mana to make it, I should still get to use at least a part of its benefit. Many dungeons/towers are still a long hike from the central locations.