I'm not sure if this is only a problem for GHs in Tryker lands but when you enter the GH, you start in front of the door to guild council and have to run around to the other side to exit. When you accidentally end up in the guild council area and come back out, it can be really confusing trying to find the real exit. I doubt this would take too much effort to fix and I'm sure it would be appreciated by many players.
