It was still changes that were desperately needed after half of Stormwind was on fire for years on end. Both Stormwind and Orgrimmar could use some graphical upgrades to fit better in with the updated aesthetic we have had since MoP. Doesnt ahve to be massive changes either, Legion dalaran and Darkshore in BfA has shown that simply updating a few trees, adding in some new models and updating the ground textures can work wonders, even when they don't change much at all.