me and my fiance was redoing a gauntlet trying to get a sword, when i accidently took the wrong way and then i left the gauntlet/instance, and we had to start all over.
then we thought, there should be a note or sign saying, are you sure you want to leave or something like that, so that you know wich way to go, as it isnt always clear when no quest helper is there to help you.
also it would be very nice with a note, on estimated time of the gauntlets or a notification about it is a long instance that you cant leave, so that you know when to pot up