I'm a Titan, fairly exclusively, and play Defender mostly. I think the WoD is in a very tough spot. When choosing to play as Defender, with PvP in mind, you are taking a very niche, but useful, role on. Bungie could easily find that by tweaking the WoD to be a tad more offensive oriented, you will make all other classes obsolete. I like where the WoD is currently. Fantastic in PvE, and very useful, but not OP, in PvP.