Yeah, I agree that the threat system in Stormblood (and you can even argue throughout FFXIV) was flawed, but I'd gladly take what Stormblood had over just pushing one button and forgetting about it. At least there was SOMETHING. And not to mention the other effects the tank stances had, such as Warrior's increased health and health restoration from magic or Paladin's 20% or something damage received down.