I can honestly say that as a primary character warlock player I agree with this.I have played all three classes and my last and most recent character is a titan defender. In PvP, Titans are disadvantaged,their main strength of Armour is pretty much non-existent. They are the only class without some form of ranged melee. Blink strike has similar range to a warlock melee and Throwing knife can have a greater range than a warlock melee if the user is accurate. However both of these are just Charged Melee abilities. The titans charged melee abilities have no extra range to a standard melee. Neither titan subclass possesses a grenade that has some form of tracking like The Axion bolt,Arc Bolt and the DoT sunslinger grenade.