Most when they talk about Nostalgia and WoW refer to the player base’s nostalgia for Vanilla, tBC, or even Wrath. It is usually what ever expansion they started to play the game in. While this can be harmful to the player base community all in all it does not affect the game much overall.
When the nostalgia is of the developer persuasion that is when all hell breaks loose. That is also where Warlords of Dreanor is looking to be heading.
From the outside looking in, by reading many of the interviews of various Blizzard developers, it seems they are all under the effects of 1 of the following problems potentially both. First as mentioned Nostalgia for WoW’s heyday somewhere between the middle of Vanilla and Wrath, technically tBC but it is more of a spectrum than specific point. Alternatively the other description I would call a mid-life crisis. This is exemplified by all the marketing for WoD being reminiscent of an adolescent male’s gaming group. All boys and no girls allowed to have any of the story or main character positions.
Anyway for WoW’s sake I hope that I am wrong and that WoD will be great. I am not holding my breath, I am however gathering kindling, marshmallows and popcorn for the epic flame fest that will ensue when the first group of players reach 100 and can’t fly and are not of the type that constantly reads forums and news about the game they play.