How to make tanking fun.

[Awful]

I have to agree with Kalise on this one. Active mitigation typically has to be something that is not reserved for express use. If it could, it wouldn't require any active efforts on the player's part to prepare for the coming damage, merely a timer of sorts. There has to be an integral means of compromise available to be manipulated, decisively and timely, towards mitigation.

How WoW decides to redefine the term as in order to offer additional gimmicks and continue not to have much actual active mitigation is of no consequence to its typical meaning.

It depends if you're doing Mythic+ tanking it's no different than say an Expert in XIV where you save your CDs and cycle them for example, if you're doing a Mythic+10 you'll have 4 affixes affecting you and depending on the A) Dungeon B) Affixes C) Season affix (right now in BfA it's Reaping where all monsters you killed at a % percent completion come back to life to attack you all at once). You generally plan how you're going to do them based on your CDs, how to juggle them, your healers CDs, and Line of Sight if needed all comes into play. Raid tanking is more or less CD cycling on trash/tank CDs on bosses in BFA.

Honestly if XIV had Mythic+ dungeons I think it'd work very well if they redesigned tanking to a more Active Mitigation tanking or leave it as it is and add in Pomanders from PoTD/HoH to give it a unique FFXIV with it's own Affixes and I think it'd be better than WoWs.