Do you know how many people threatened to quit the game? Do you remember how many raging priest threads were made at the beginning about the state of disc at that time? The number of subscribers has plummeted, you really think they wanted to risk losing more when you consider that a large majority of players felt they were so replaceable-- that they couldn't even play the spec? Which therein itself made people either a) want to re-roll-- which could lead to no longer playing because of dissatisfaction-- or b) just quitting in general.
When you consider the people who made such threads and goaded on the others to join in, it's not so surprising that Blizzard would try to act on it fast because 90% of the posters were the knee-jerk-reaction-type of player who said the sky is falling before fully understanding what's going on. Or even attempting to try something new.
You would think if your players were complaining you would more aggressively try to fix the problem. Slapping a band-aid on it isn't a great solution. Furthermore, you would think you wouldn't have needed to slap such obscene band-aids on it because you would have done a better job designing the spec during that long wait we had... between expansions.
Oh, and I sure hope they aren't putting too much weight into, "Fix me now Blizz or I quit." posts let alone the WoW forums in general. Most of those posts are just people blowing smoke out their !@# and the WoW forums really aren't the best place to get game balance advice. In fact, they really shouldn't need to be given much in the way of numbers to balance the game. It's their job.