Why should blizzard care about the opinion of thousands of players? Maybe because they are part of the playerbase? and the want a better game? Hello? YOu think your opinion is better or what? You think the opinion of people playing beta under NDA is more valuable? Get outta here you selfish prick.
The datamining and testing shoulda started long ago actually if they want a good expansion with tons of feedback. But you don't care about that, you just do your casual daily quests and RP in goldshire i guess.