PVP WAR has downsides. It's not personally great at damage unless LB is up, and only then at risk to itself since it has to go in. It is fantastic at setting up kills and disrupting what you're trying to do. Getting got by team combinations is a real thing in 6.1 PVP, as opposed to the simple "I heal you, you go DRG / MNK / NIN" combination of the previous build.