Right now event leave nodes simply takes you straight to the Great Hall. This means that when there is an event running, all you have to do (if your Great Hall warp is on cooldown) is warp to the event and click the leave node. I doubt this is intended and with events being in a seperate world now, it may be possible to have the nodes return you to your previous position rather than the Great Hall. This would also be useful to people who want to enter an event but return to where they were beforehand.