There as apparently an outcry from the members of the PVP community who were mad at Commandos, and Mercenaries, who did nothing but spam grav round in PVP, so I guess this is supposed to encourage us to become a 3-4 button class as opposed to a 1 button class in that one specific arena?
Stupid nerf is stupid though because even a commando with a fully robust rotation was using at least half their GCDs on Grav Round because everything in the gunnery tree is tied to it, and after this change they're STILL gonna do that. My thought is that if they wanted to encourage more active rotations give us a reason to actually use Charged Bolts over Grav Round. Everything in the tree is tied to grav round (whereas only about half of it is tied to Charged Bolts) and Grav Round feels like it averages more (because we all like the color yellow more than the color white).
I found it extremely funny that my vanguard and sage got their talent points back but my gunny did not. oh well