I have been dropped from raids twice today on Adamantoise. In both cases when I was finally able to get back on I got errors saying unable to load character profile due to server congestion. I was still able to select the character and slowly relogin. I don't see how it could be server congestion when the different areas I have been in today have always had less than 40 players across the three instances. You really need to spend some money on resolving your infrastructure problems as this type of performance isn't acceptable in this day and age.