Under no circumstances should PLD have the same DPS as DRK and WAR unless they all have the same defense but then why even have 3 different tanks? If they level out DPS you are back to 2.X where there was never any reason to have a WAR. It should be defense risk vs. DPS reward. Unfortunately current content doesn't make tank risk a real thing.

Content needs to be thought out more so it utilizes the strengths of all 3 tanks more and PLD should have more utility added to balance their lack of DPS. Its exactly the same as AST. Healers have great design that should be mimicked.