I admit that the Mega Server idea is a neat one.
However, in practice it does not work out so well
as my personal experience seems to indicate.
It is fact that if the Server goes down
immediately a huge number of players are effected with no
way to detour to another Server. No, the second mega server is not an option
due to the large download required.
Also, playing from Australia I noticed clearly that I have no trouble
logging on at US off-times. However, at peak-time in the US it is almost impossible
to get into the game due to the exceedingly long time stuck in the loading screen.
This, so I verify from personal experience, is a regular patter.
The issue... Might it be that Mega Servers have a load threshold and if this is reached things go askew.
Solution...open up a few more (normal) Servers.
Well, I am fully aware that whoever is in Charge of the game will not do so.
Therefore (I guess) I have to wait patiently until player numbers dwindle by natural attrition to a level where the Mega Server can handle the load. (yes, a little sarcasm here).
Good luck to us all.