Legitimately curious, because I don't follow MMOs anymore, what other games did this and it was successful?
Other than EQ2 there's GW2 and Aion but we're talking about ages ago and my memory is a bit fuzzy so let's leave those aside because actually I'm not 100% certain anymore now.
But WoW did it for the longest time, on main servers and recently even on classic ones.
I happened to be in one of those servers at least twice that I can remember.
Another game that did that at least a couple of times was FFXIV but I don't follow that MMO as much to see wether or not it was successful sorry.
With "successful" I mean that they managed to somewhat noticeably reduce the population on a few specific servers, while bumping it up on a few other servers which were suffering from the opposite issue.
Does that mean that everything was PERFECTLY equalized? Of course not, but the gap was noticeably reduced so yeah, I call that a success after all.
Going back On Topic, would that have worked for FFXI?
Maybe not, like Thorny said.
And after all Eiryl is right too, SE (as usual) moved way too late.
Still, if they announced a lock for Asura AND Bahamut AND Odin at the same time, and they also announced free server jump from those three server to any of three lowest population server, would that have worked?
I doubt Asura's population would've suddenly dropped off to 1500 and I doubt those servers which average 300 people would've suddenly skyrocketed over 1000, but I'm pretty confident the currently extremely large gap would have at least become maybe still noticeable but definitely smaller.