Affects Version/s: Minecraft 1.8.1
Fix Version/s: None
MC-57516 - The CustomNameVisible tag was removed from the entities it served the most use for.
This made the flag almost 100% useless. The community requests that the feature be returned as a way to override the new 1.8 behaviour and let the setting control if the name should be visible or not.
It makes logical sense, that if the flag saying to make the custom name visible, to actually make the custom name visible...
It should not matter that the underlying code was changed, the code should be updated to support this flag the way it worked before as it was a supported feature.
A supported feature should not be removed without a good reason, and we do not see a reason provided here.