I mean, there isn't really anything a maintenance would do to fix this. They purposely made it so only a limited amount of people can use that instance at a time so the servers don't explode. Just gotta wait or get lucky :v
Gotta say, expansion is pretty good despite the rocky launch. Raubahn (savage) took some time to get through, but was amongst the more lucky ones to beat this trial in a relatively good time. Thankfully didn't get stuck on Susano either. Summoner at level 70 is pretty fun to play oo which I am happy about (my main since I started playing in 2.5). Now it's time to level gatherers/crafters.
The only downside is, that I have no time to play anything else ATM