Let's just face it. In wrath, the devs were the closest to being 'held accountable' for some of their horrible decision making as they've ever been. They were still really, really, -really- far from that point where it might actually come back to bite them in the ass, but the fairly open line of communication meant that they could get a metaphoric earfull when they !*@&ed up hard - and they did.
Cataclysm is a disaster in terms of balance, and I'm almost 100% sure that they know it. However they've managed to wall themselves off from most of the community blow back, but they're still trying to give the illusion of feedback / open communication. In order to both maintain their 'safety' while answering those questions, they need to only pick 1-2 real questions, and then simply !###!-foot around those. The rest have to be silly BS stuff that doesn't even deserve the time of day, but they can use the excuse of it being popular.
Im going to assume you're joking on the bolded part. As the devs have said, cata is the most balanced this game has ever been in terms of who can do what. Every tank is being used. Every healer is being used. Almost every single dps spec is being brought. The only ones that are NOT competing properly are the "pvp" specs, because they cant be brought up too much to risk pvp overload. Dont give this bullcrap about THE MOST UNBALANCED EXPANSION YET!!@!