Server down message
I mentioned it on discord but I guess I'll post it here.
I suggested a scrolling message for in game but at the time from your end the servers where down but people where still connected to it.
Maybe a count down message on the chat server and an auto response message when any player sends a message saying that the servers are off and to disconnect.
I'm sure this test weekend has you guys putting on your troubleshooting hats. So good luck with all the data you are receiving from this load test.