Model Updates
The team looks at a lot of old models, such as the Death Knight's ghoul model and considers if it helps to push the story to update the model.
The team tries to update models that can be an overall fidelity win for the game.
The Death Knight ghoul is a good example, as once it is updated, the new model will appear everywhere in the world where there are ghouls. The likelyhood of that happening is higher than something that is a model just used by one class or in one place in the game.
There aren't any plans to update skyboxes in older zones right now. The team tries to utilize the existing world in ways that make sense for the storytelling.
The invasions allowed players to go back and see some zones that new players may have never experienced before.
The team would love to go back and update these skyboxes and it could be done while maintaining the familiarity of the old skybox.
They never want to change the world in a way that makes the player feel like they can no longer connect with the world they remember.
In Patch 7.2 the team is going to update many different demon models, including some of the new ones created for Legion.
The team wants to do more for shapeshifting and different forms, but it is a smaller subsection of the player base that plays that one class or spec. Spending a lot of time on that model means that a lot of time is being spent on something that not a lot of people are going to get to enjoy. The things that the majority of the playerbase will be able to experience come first, then smaller things.
There are no plans right now to do more Druid forms in the immediate future, but it is something that will always continue to think about and do as often as possible.
Varian's sword changed color on the Patch 7.1 loading screen to match the in game cinematic.