We did have stuff like this in BfA. After you defeated a goddamn World Soul in Legion you move to uncover a political plot involving pirates in Boralus, a witch coven in Drustvar, we attack/defend a Zandalari city in an old school battle etc. Even Nazjatar was pretty tame. The problem with this is, you can't really do it entire xpac. There needs to be an escalation.