we've already made all of the adjustments we had planned in the wake of the Readiness nerf. Yes, this means that you'll be less effective in certain situations (such as BM burst in Arenas). That was the point.
We're still monitoring performance and tuning appropriately, and that will continue. It's important to remember that changes to other classes will have an effect on where you stand in overall performance. Comparing 5.4 PTR Hunter DPS to, say, 5.3 Fire Mage DPS would be silly, as Fire has been brought down considerably. Players will always tend to gravitate towards whatever the "best" spec happens to be in a given patch cycle, even if the differences are very minor. If Survival ends up doing even as little as 2% more damage than Marksmanship, I suspect we'll still see many claims that Marks is "not viable."
rofl is this a joke?