In pvp especially Lethality is just not putting up the numbers that a melee dot class should be. Two expansions in a row dot damage has not scaled with the health pool. Dots are hitting for almost the same total damage they did in 2.0. Sustained damage is average, burst is not good. If there is even one decent healer on the other team, they will heal through all of your damage. So much of surviability is on the GCD, which hurts dps even more losing GCDs to self-heals and having to refresh hots. Having that long of set up time to do mediocre damage just doesn't work in pvp. Something needs to change.
First, dot damage needs to go up by a considerable amount. Second, operatives as a whole need to have their aoe damage increased (fix that broken pos Carbine Burst). Third, survivability needs to come off the GCD. It is not acceptable that in 4.0 there are specs that still have defensives on the GCD.