Here's the thing with the 'nerf' to rogue, there's only two ways to approach it. Buff the current DD classes, or 'nerf' rogue. Given that the rest of the classes have had 2~ years of balancing against eachother and their intended playstyles, any changes they make would have to be for every class which would require not only balancing against rogue but also eachother again. Alot of work. Rogue, on the other hand, can easily just be balanced against the DDs given the class is, itself, a DD and the other DDs are already balanced against the rest of the classes. Given this, it's only sensible to 'nerf' rogue, bring it more in line with the classes we have.