Yeah. I've only done Val'Sharah so far. <3 druid lore.
(Although, I disliked much of that story. /sniffle) But then, I enjoy searching for the bugs too...
On-topic: Yeah. As good as they say Nost was, it took those guys YEARS to even get it to where it was, and that was with using an emulator that had already had YEARS of development. So, Blizzard is right when they say that it would take a lot of time and money to bring those versions of WoW back. And I do mean *versions*, because they would need Classic, TBC, Wrath, Cata, MoP, and WoD servers that are Normal, PvP, RP, & RPPvP in each region (NA, EU, OC, CN, KA, etc etc.)
Then those would all be competing against each other and the main retail version of the game, diminishing the player base on each different type of realm...
It just makes no sense to do while active game development is occurring on the game. When its life-cycle has ended, maybe then... But even then, it wouldn't be for years.
Now, if Blizzard wants to hire me on as a developer to work on said project, they are more than welcome to. Other than that... Let's wait until after active development on WoW stops.
They should be happy they even got "pristine server" discussion out of Blizzard.