Eh not really Gjallarhorn isn't that good in pvp compared to other exotic (Truth) and legendary rockets. And it hasn't been modified by Bungie since the release of the game even after they saw alot of videos of people on Youtube beating Atheon in 10 seconds, Taking down Crota in a second, and beating Skolas in 30 seconds. That means Bungie knows how powerful the Gjallarhorn is and the fact that it hasn't been nerfed means it will never get nerfed even if everyone had it. If it doesn't need a nerf it won't get nerfed.