I have never often seen game developers speak common sense. I don't know who that person is besides Lead Content Designer, but he clearly speaks sense.
I was never around during TBC, but I totally agree MMOs as a genre needs exclusivity. Does it sense of elitism, which game or profession doesn't breed elitism. But that isn't really the problem. When content becomes freely available to everyone, there is often a drop in quality and content.
Blizzard works purely from a "greed" point of view. For them numbers make or break their game designs. Cataclysm proved everything what is wrong with Blizzard. They started of in one direction but didn't have the BALLS to stick to their guns. Once the loss of subscribers played its part, they nerfed content to the ground.
I don't consider myself a hardcore or an elite player by an means, but even I wouldn't want things to be handed to me with out any effort.
Its comparable to mounts and how much pride or excitement people get from rare drops. Its cause certain mounts are exclusive and not every one has access to them.
Let me ask the community, how much has the "Ashes of Alar" has lost its appeal? At one time only a few or 1 in hundreds had it. Now it seems the ratio is much much lower.