This post goes a long with the other talking about when you d/c from a dungeon even with the 10 min timer getting fixed and if we get ported back to the beginning or even for a more practical use. You should implement a teleport node or ground pad of some sort from the entrance to the first bosses room. Say if you d/c on Batraal and come back on if it forces you to start at the entrance and run back then your party maybe screwed especially if you are a healer or something. Unless you just stay where you d/c then it would not be needed. It would fit into the design of the dungeon because there is the magitech portal in there already plus all the nodes you stand on.

Also when you d/c are you implementing the feature of being able to stay in the party but be in an offline status til you sign back in? Or is it going to stay current and you have to be invited if your group is not in combat? Because if that is the case that brings up a whole new set of problems. Should be able to invite people while in combat as well as do other normal functions like teleport etc.