I play on Balmung, and can say that this has happened a few times this weekend. It seems that things have only gotten worse since the emergency maintenance approximately a week ago. I was googling this lobby issue after I had run into it and found a Reddit thread where the folks swore by resetting your modem/router to fix this. I figure "what the heck, I haven't got anything else to lose". I tried it and I was able to get right in. I've had to reset my router twice this weekend, but I'm at least able to get in game.

Don't know if it will help but I thought I would pass it on.