RP-esque class based humor/insults ...
anyhow
More than 1 target? It was more difficult to hold enmity and your party had to work together in order to do so. Everybody target the same thing as the tank for best results (or AoE).
AoE damage to the whole party? WHM needed to be careful not to just spam medica/medica 2.
DPS class wants to stack damage cooldowns and go all out for a quick burst of damage? Either tank needs to match with their own burst damage/threat abilties (FoF, Berserk, Unchained) and/or the DPS needs to manage their enmity.
Speed run where you're fighting many packs as quickly as possible? You must manage threat vs. TP/Mana usage very carefully in order to keep going.
Even basic single target fights, the tank needed to pay some minimal level of attention to their threat. WAR requires a little more attention here since some of the actions they want to perform are low threat moves, so you need to have a clear threat lead in order to do them. 1 BB combo to hold threat at the start of the fight? 2? Do I need to do a single BB before the first combo just to make sure I've got a threat lead?
Future encounters, if the tank ever became stunned/unable to act for a period of time, enmity might be more of a concern.
Now, none of that matters.
You've gone from something you used to have to pay the most basic amount of attention to. Do your combos, check threat on multiple targets, etc. Now you barely have to pay attention at all. Lead off with SP combo? Oops, i'll just hit BB a couple of times (NOT COMBO'D) and it's not a problem. Did a couple BB combos on the boss? Yea, I can probably just switch to SE>SP for a while and drop BB entirely. I'm a spaz and keep running back into Halitosis' (the last boss of Manor HM) dark mist at the last second and get hit with it 4 times during a fight? meh, still not even close to losing threat. Oh, i'm getting lazy and I only hit flash twice before switching to single attacks so I'm about to lose threat on a target? drop the end of a BB combo on him and I don't have to worry about threat till ... well, I don't have to worry about threat on that guy till he dies.
It's gone from something you and your group should reasonably be able to control to something you barely need to pay attention to at all.
As an aside, did you ever figure out why WARs don't lose 33% of their damage when they activate Defiance?