Just a simple plea.
MOP story is unplayable on Retail due to all the content that was removed from MOP like the original value and the legendary quest chain.
Classic was supposed to be a museum so… keep it as a museum. Don’t destroy the story pieces (Another reason why an eternal WOTLK realm was needed but that is another topic)
This time when the last MOP phase is released… keep the original Vale. Don’t restore it in MOP Classic to make it unavailable again before even MOP Classic ends.
The Barrens quests? Keep them… Don’t add it on a MOP Classic phase to be removed on the next one.
The Legendary Quest Chain? Keep it if MOP Classic moves into WOD Classic (and the same for WOD Legendary Quest if Legion Classic is released)
There was no reason to remove the whole story on the original release (maybe the Vale was not possible to keep with 2012 tech, but it is now) and there is no reason to destroy it now. Even if you want to keep exclusive things for those who play during this Classic release… well… the achievements and other rewards could be removed at the end without removing the content, you know?