Well you still won't catch up with good dps especially since decimate doesn't have aggro multiplier. You also need to do one eye combo (3 gcd) for the eye buff now, instead of just doing heavy swing and maim. Honestly thinking about stance dancing in dungeons is giving me headache lol, but I'm much more concerned about the raid opener/rotation especially when you need butcher's block to pull the boss. Potencies may change, but unless they change the gauge generation (which I doubt) the rotation should stay mostly the same.