+1. Everyone else just wanting the cost reduction is trying to take the easy, don't-have-to-think-about-what-I'm-doing route. PvE Rogues dual spec Combat and Mutilate and change up their spec accordingly for when they need more single target or more AoE. Is it reasonable to expect that Cat can do both at the same level without having to go through the hoops of entirely changing spec (which for rogues mean a completely different gear set with completely different enchants/gems/reforging). I don't think so unless there is a "cost" associated to it, and that "cost" has to be skill. Lower cost = no skill, button mashing. More damage, same cost = think about what you're doing, when you're doing it, and how you're doing it. Being GCD locked or bumping 0 energy is not the most efficient, effective, optimal way of operating. In the grand scheme of raid fights, there is no difference between (using simple numbers) 2k damage one time in 3 seconds or 1k damage twice in 3 seconds, which is effectively the scenario people are comparing against. Get that bigger damage out in one action means you open up time to do other things, which is always a win.