Not at all. Blizzard is making a big song and dance about their Beta programs, and part of that is feedback from players.
People will make their point in whichever way they think is best, and that's not always going to make for a great read. Sometimes people don't see the big picture, or sometimes they are unaware of how unbalanced their favourite ability was. But in other cases they are giving voice to concerns shared by many people who - as has been pointed out - just leave. And leave they did; by the millions!
Whatever the merits of the complaints, these people are all concerned about and invested in the World of Warcraft and want to see it do well.
Blizzard could be far more active in these discussions to explain their thinking and engage with the concerns that people put forward.
No, but the current development team is not making the game for the same kind of player that the original team made the game for.
However, there is still a sizeable group 'from the old days' around who are protesting this obvious change, perhaps against their better judgement.
The difference being that we can read and hear what the vocal minority has to say about this or that, but that nobody knows what the silent majority wants or thinks.
Other than the fact that millions of former WoD-subscribers have left the game, of course.