As others have stated, the strength of FFXIV is PvE. If PvP were to be implemented it should be after SE "fixes" the core game. I see no reason to add something more to the "to-do" list right now seeing as how the base is far from perfect.

Also, when I read/hear PvP it just reminds me of "The World" (.hack//) and all of the crazy stories about PKs and PPKs, etc..crazy I tell ya'!