I doubt redundancy didn’t occur to Blizzard when designing this system. Say if you were an US player with an EU account, you’d want to check how people are doing there while the US maintenance rolls on forward.You would login on the EU client and get a warning stating the logon might be slow because your preferred auth server (US) is offline and you are going to be auth’d on a server located in EU.

Or, they could just have a service where you could migrate your B.net to EU servers…

The Real WTF™ is still why the odd logic?

On a side note, it’s possible to find the physical location of the realms, and the instance servers associated with realms/battlegroups. It’s generally a good idea to use a realm as close to you as possible.

I’ve found that my disconnect issues dropped to zero when I moved to a server that is located in the same city as me. Plus, the lag is so low that I can beat everyone to the mining nodes.

Not that any of that will help, of course.

It will also have the second coming of Christ included in one of its patches. Then you’ll look silly!