It would be immensely helpful to all players if there was some indication that the servers are undergoing maintenance whenever players fail to login/authenticate during server maintenance.

It causes confusion for myself, the many people that post on various forums, and those that ONLY post on forums when they're experiencing this issue. It makes the game seem like it's broken when you are attempting to login and are just getting a generic message back that makes it seem like there is just a problem happening and not a controlled situation (i.e. scheduled maintenance/patch deployment).