So in the Afterlives trailer, Draka changes her way from being a Warrior to being a Rogue.
We know Blizzard likes to copy other games, and FFXIV, WoW's biggest competetor, has a system where you can be "all" classes/jobs on your 1 main character.
With the current meta of "maining" so many characters, constantly switching specs, and the constant complaint that people want things account wide...
If your Night Elf can be all Night Elf classes, maybe people would go back to playing 1 character?
NOTE: I don't personally want this.