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Zogarth
My point was more that numbers are always a tuning knob available and that they can solve any balancing issue. But a spec being able to kill people in 2 hits to compensate its lack of utility / mobility, while it could be balanced, won't be fun for the players playing it or against it. Arms Warriors have a 4.2% representation in 2.2+ 3v3 arenas at the moment for example, if you buff their damage by 10% they would go up to something like 7-8% representation. If you buff them by 30% instead, while they won't be able to oneshot people, their pressure would allow them to most surely be the most represented spec in arenas.
Death Grip is extremely good in RBGs that is true, because it allows a team to get line of sight on a healer to try and burst him. But otherwise it is pretty poor because of the long CD and because nearly any specs in the game can counter it by using a more frequently available mobility spell. Using a Death Grip on a DH, a WW, a Warrior, a Feral, a Mage, etc, in order to peel for your healer in 2v2 is 95% of the time a strategical mistake for example. They even put Death Grip on the GCD to reduce its use as an interrupt.