The fact that BLM got nerfed so quickly is a clear proof that it was seriously broken considering how excruciantly slow they tend to be to balance patch again.
No one denies that PVP balance is an iffy thing but sometimes the changes range from baffling to literally nonsensical and not only on PVP but PVE as well. They are on a serious need of having extra devs to dedicate fully to job balancing and developing, and this is an issue that its years old already