OK everyone, the discussion is over. The moderator calls the lead designer of WoW the authority.
Authority of what? He has
responsibility and authority over those who work under him in the corporation he works for. There's a small nuance between responsibility and authority (the Valve Handbook might be interesting in this reference).
He's not the one who ultimately judges the game is good or bad. Us players, we do that, and yes we are biased. And even then anyone who thinks GC is the one who's deciding on everything in WoW is giving a lot of other people not the amount of credit they deserve which you can understand if you look at it from a responsibility point of view.
GC doesn't have the luxuary to decide on how well WoW development was done.
History will have the honor doing that, and even history, even encyclopedias while attempting to be unbiased and informative
contain bias. Since it is rather recent, relevant work the cards aren't all played yet. Which is why it is interesting, and why the discussion isn't irrelevant. On top of that, the discussion is largely hypothetic since we don't have direct influence on WoW's development. If you're not interested in the discussion you are free to be silent or put those who have the discussion on your ignore list.
PS: And also since Blizzard is making a new MMORPG the discussion is relevant. We can only wish they're listening to our suggestions.