There are obviously still some issues, but it's better. I got onto Cactuar during bandwidth and game usage prime time after work last night and stayed on uninterrupted for a couple of hours. The game 900000'd me and everyone else involved in a fate, but we were all able to log right back in and chat about it with a minimal queue wait. It even retained my experience gained from the failed fate. I was in for another couple of hours until I logged off and went to sleep. Some lag, but manageable. Best experience since beta 3.