Big bang was justified / Big bang was not justified

It depends, what is "Big Bang"? Is Big Bang the rebalancing of classes, or the restructuring of the game? As far as I remember, Nexon advertised that a large part of Big Bang was that it allowed them to do much more with the game, because it let them completely redo the "Skeleton" of the game. There's also the part where they rebalanced everything from classes to monsters, pretty much to compensate for them releasing cubes.

Then of course them restructuring Victoria Island to make it easy to navigate.